COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Detail)

v2.4.1.9

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 30,129us-gaap_DefinedBenefitPlanFairValueOfPlanAssets		$ 27,510us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Plan assets target allocation	100.00%ups_DefinedBenefitPlanAssetsTargetAllocationsTotal		100.00%ups_DefinedBenefitPlanAssetsTargetAllocationsTotal
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,705us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member		12,080us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,447us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member		8,170us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,977us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		7,260us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		6,833us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	269us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		223us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		138us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,595us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		3,738us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		2,829us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,323us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		1,397us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		1,416us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,307us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		1,091us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		1,039us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 | Risk Parity Funds [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	817us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		756us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member		1,362us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
U.S. Postretirement Medical Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	259us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember		355us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember
Domestic
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,087us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_StatementGeographicalAxis = ups_DomesticMember		26,579us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_StatementGeographicalAxis = ups_DomesticMember		100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,772us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		626us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	6.10%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2.30%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,303us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		11,669us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	744us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		112us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,860us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		7,705us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,028us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		514us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,924us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		7,205us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,634us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		10,462us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	36.60%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		39.40%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		25.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	55.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		55.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | U.S. Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,148us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		4,212us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | U.S. Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	366us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		507us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,386us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,367us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,788us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,154us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,946us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,222us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,600us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		7,519us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1 | U.S. Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,066us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,264us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1 | U.S. Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	322us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		457us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,270us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,247us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,788us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,154us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 1 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,154us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,397us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,034us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,943us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2 | U.S. Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,082us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,948us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2 | U.S. Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		50us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		120us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 2 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	792us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		825us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3 | U.S. Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USLargeCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3 | U.S. Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_USSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Equity Securities [Member] | Fair Value, Inputs, Level 3 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,848us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		7,877us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	30.40%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		29.60%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	25.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	772us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		681us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | U.S. Government Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,780us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		4,361us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,196us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,780us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Municipal Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		55us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,547us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3,753us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | U.S. Government Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,541us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3,746us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 1 | Municipal Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,419us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3,901us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	159us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		681us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | U.S. Government Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	239us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		615us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,921us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		2,550us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 2 | Municipal Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		55us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	882us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		223us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	613us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalCoreMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | U.S. Government Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USGovernmentDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	269us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		223us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Fixed Income Securities | Fair Value, Inputs, Level 3 | Municipal Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_USStatesAndPoliticalSubdivisionsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,595us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3,738us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	12.40%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		14.10%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		8.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,323us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,397us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	4.50%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		5.30%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,766us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,397us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets	6.10%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		5.30%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Minimum	1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Plan assets target allocation, Maximum	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Risk Parity Funds [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	817us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	756us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Percentage of Plan Assets	2.80%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	2.80%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Domestic | Other Investments [Member] | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			326us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_AssetBackedSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Percentage of Plan Assets			1.20%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_AssetBackedSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets target allocation, Minimum	1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Plan assets target allocation, Maximum	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Domestic | Other Investments [Member] | Structured Products [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	332us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Percentage of Plan Assets	1.10%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Plan assets target allocation, Minimum	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Plan assets target allocation, Maximum	5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]	5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	412us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		285us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Risk Parity Funds [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		21us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Risk Parity Funds [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			326us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	332us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,595us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		3,738us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_HedgeFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,323us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,397us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_PrivateEquityFundsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,307us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember		1,091us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Risk Parity Funds [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	817us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]	756us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_RiskParityFundsDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[1]
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember
Domestic | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_DomesticMember	[2]
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,042us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_StatementGeographicalAxis = ups_InternationalMember		931us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Percentage of Plan Assets	100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_StatementGeographicalAxis = ups_InternationalMember		100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		28us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Percentage of Plan Assets	3.10%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		3.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Minimum	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Maximum	5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	402us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		411us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		11us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	587us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		465us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 2 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		17us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		55us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fair Value, Inputs, Level 3 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	463us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		422us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Percentage of Plan Assets	44.30%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		45.30%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Minimum	50.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		50.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Maximum	65.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		65.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		19us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	177us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		167us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | local market equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	250us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		219us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | U.S. Equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		17us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	263us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		246us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		19us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	82us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		88us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 | local market equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	145us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		122us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 | U.S. Equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		17us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		176us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	95us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		79us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 | local market equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	105us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		97us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 | U.S. Equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 | Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_GlobalEquitiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_InternationalSmallCapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 | local market equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_LocalmarketequityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 | U.S. Equity [Domain]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_U.S.EquityDomain / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_EquitySecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	227us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		239us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Percentage of Plan Assets	21.80%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		25.70%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Minimum	15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Maximum	35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	149us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		171us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Foreign Government Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		68us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	133us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		154us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		86us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 1 | Foreign Government Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		68us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	94us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		85us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	94us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		85us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 2 | Foreign Government Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_CorporateBondSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Fixed Income Securities | Fair Value, Inputs, Level 3 | Foreign Government Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_ForeignGovernmentDebtMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_FixedIncomeSecuritiesMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Other Investments [Member] | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	108us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		63us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Percentage of Plan Assets	10.40%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		6.80%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Minimum	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
Plan assets target allocation, Maximum	17.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		17.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Other Investments [Member] | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	212us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]	179us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]
Percentage of Plan Assets	20.40%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]	19.20%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]
International [Member] | Other Investments [Member] | Structured Products [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets target allocation, Minimum	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[2]	0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[2]
Plan assets target allocation, Maximum	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[2]	10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_StructuredProductsMember / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[2]
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 1 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	108us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		63us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 2 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	159us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]	124us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 | Structured Products(1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember		0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_RealEstateMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember
International [Member] | Other Investments [Member] | Fair Value, Inputs, Level 3 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 53us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]	$ 55us-gaap_DefinedBenefitPlanFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = ups_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / invest_InvestmentSecuritiesClassAxis = us-gaap_OtherInvestmentsMember / us-gaap_StatementGeographicalAxis = ups_InternationalMember	[1]
[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmNhNTYzYzQyZjAzYTRiMDBiMzA0YzczOTMxNDJhNmQ2fFRleHRTZWxlY3Rpb246MDlEODlCNjQ4NDNGQzBGNDJCRjlEQkM1RjNFMkNBMTAM} [2] Represents mortgage and asset-backed securities.