Quarterly report pursuant to Section 13 or 15(d)

Summary of Marketable Securities (Detail)

v2.4.1.9
Summary of Marketable Securities (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Marketable Securities, Amortized Cost Basis $ 1,930ups_MarketableSecuritiesAmortizedCostBasis $ 992ups_MarketableSecuritiesAmortizedCostBasis
Marketable Securities, Gross Unrealized Gain 7ups_MarketableSecuritiesGrossUnrealizedGain 2ups_MarketableSecuritiesGrossUnrealizedGain
Marketable Securities, Gross Unrealized Loss 2ups_MarketableSecuritiesGrossUnrealizedLoss 2ups_MarketableSecuritiesGrossUnrealizedLoss
Total Estimated Fair Value 1,935us-gaap_MarketableSecuritiesCurrent 992us-gaap_MarketableSecuritiesCurrent
Other debt and equity securities    
Schedule of Available-for-sale Securities [Line Items]    
Marketable Securities, Amortized Cost Basis 511ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
48ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
Marketable Securities, Gross Unrealized Gain 3ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
0ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
Marketable Securities, Gross Unrealized Loss 2ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
0ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
Total Estimated Fair Value 512us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
48us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ups_OtherDebtAndEquitySecuritiesMember
U.S. government and agency debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Marketable Securities, Amortized Cost Basis 315ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
321ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Marketable Securities, Gross Unrealized Gain 1ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
1ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Marketable Securities, Gross Unrealized Loss 0ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
1ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Total Estimated Fair Value 316us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
321us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_USTreasuryAndGovernmentMember
Mortgage and asset-backed debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Marketable Securities, Amortized Cost Basis 88ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
89ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
Marketable Securities, Gross Unrealized Gain 1ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
1ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
Marketable Securities, Gross Unrealized Loss 0ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
1ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
Total Estimated Fair Value 89us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
89us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AssetBackedSecuritiesMember
Corporate debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Marketable Securities, Amortized Cost Basis 1,016ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
534ups_MarketableSecuritiesAmortizedCostBasis
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Marketable Securities, Gross Unrealized Gain 2ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
0ups_MarketableSecuritiesGrossUnrealizedGain
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Marketable Securities, Gross Unrealized Loss 0ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
0ups_MarketableSecuritiesGrossUnrealizedLoss
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
Total Estimated Fair Value $ 1,018us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember
$ 534us-gaap_MarketableSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateDebtSecuritiesMember