Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS AND RESTRICTED CASH - Additional Information (Detail)

v2.4.1.9
INVESTMENTS AND RESTRICTED CASH - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Gain (Loss) on Investments [Line Items]    
Trading Securities $ 1,370us-gaap_TradingSecurities $ 430us-gaap_TradingSecurities
Restricted Cash and Investments, Noncurrent 464us-gaap_RestrictedCashAndInvestmentsNoncurrent 489us-gaap_RestrictedCashAndInvestmentsNoncurrent
Fair Value Inputs, Discount Rate 7.63%us-gaap_FairValueInputsDiscountRate 7.81%us-gaap_FairValueInputsDiscountRate
cash held in escrow [Member]    
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Cash Equivalents, Noncurrent 3us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_CashheldinescrowMember
28us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_CashheldinescrowMember
Self-insurance requirements [Member]    
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Investments, Noncurrent 442us-gaap_RestrictedCashAndInvestmentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_SelfInsuranceRequirementsMember
442us-gaap_RestrictedCashAndInvestmentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_SelfInsuranceRequirementsMember
Variable life insurance policy    
Gain (Loss) on Investments [Line Items]    
Restricted Cash and Investments, Noncurrent $ 19us-gaap_RestrictedCashAndInvestmentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_VariableLifeInsurancePolicyMember
$ 19us-gaap_RestrictedCashAndInvestmentsNoncurrent
/ ups_RestrictedCashAndInvestmentsNoncurrentAxis
= ups_VariableLifeInsurancePolicyMember