Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Restricted Stock Units Outstanding, Including Reinvested Dividends (Detail)

v2.4.1.9
STOCK-BASED COMPENSATION - Restricted Stock Units Outstanding, Including Reinvested Dividends (Detail) (Long Term Incentive Performance Award, USD $)
In Millions, except Share data in Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Restricted Units [Member]
     
Shares      
Beginning Balance 12,748us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Vested (6,455)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Granted 5,064us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Reinvested Dividends 363ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendsInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Forfeited / Expired (161)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Ending Balance 11,559us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
12,748us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
 
Restricted Units Expected to Vest 11,292ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Weighted Average Grant Date Fair Value      
Beginning Balance $ 74.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Vested $ 71.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Granted $ 92.35us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
$ 80.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
$ 77.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
Forfeited / Expired $ 81.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Ending Balance $ 82.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
$ 74.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
 
Restricted Units Expected to Vest $ 82.62ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Weighted Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2014 1 year 4 months 20 days    
Restricted Units Expected to Vest 1 year 4 months 16 days    
Aggregate Intrinsic Value      
Nonvested at December 31, 2014 $ 1,285ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedTotalIntrinsicValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Restricted Units Expected to Vest 1,255ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestAggregateIntrinsicValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Restricted Units
     
Shares      
Beginning Balance 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Vested (28)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Granted 932us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Reinvested Dividends 17ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendsInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Forfeited / Expired (106)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Ending Balance 815us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Restricted Units Expected to Vest 777ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestNumber
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Weighted Average Grant Date Fair Value      
Beginning Balance $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Vested $ 96.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Granted $ 96.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Forfeited / Expired $ 96.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Ending Balance $ 96.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Restricted Units Expected to Vest $ 96.98ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Weighted Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2014 2 years 0 months 28 days    
Restricted Units Expected to Vest 2 years 0 months 28 days    
Aggregate Intrinsic Value      
Nonvested at December 31, 2014 91ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedTotalIntrinsicValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember
   
Restricted Units Expected to Vest $ 86ups_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestAggregateIntrinsicValue
/ us-gaap_IncomeStatementLocationAxis
= ups_RestrictedPerformanceUnitsMember
/ us-gaap_PlanNameAxis
= ups_LongTermIncentivePerformanceAwardMember