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MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - Multi-Employer Health and Welfare Plans (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Document Fiscal Year Focus |  |  |  |  | 2015 |  |
DefinedBenefitPlanRecognizedNetGainLossDuetoSettlementsandCurtailmentsAfterTax |  | $ 665 |  |  |  |  |
Settlement payments to fund for assumption of postretirement benefit obligation | $ 2,271 |  |  |  | $ 2,271 |  |
CashTaxBenefitDueToSettlementofBenefitObligation |  |  |  |  | 854 |  |
Change In Post-Retirement Benefit and AOCI | 13 |  |  |  | 13 |  |
Health and Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 3,486 | $ 2,352 | $ 1,222
Health and Welfare Fund | Bay Area Delivery Drivers |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 34 | 32 | 29
Health and Welfare Fund | Central Pennsylvania Teamsters Health & Pension Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 23 | 21 | 20
Health and Welfare Fund | Central States, South East & South West Areas Health and Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 2,081 | 1,306 | 505
Health and Welfare Fund | Teamsters Western Region & Local One Seventy Seven Health Care Plan [Member] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 515 | 239 | 0
Health and Welfare Fund | Health & Welfare Insurance Fund Teamsters Local Six Fifty Three [Member] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 6 | 5 | 0
Health and Welfare Fund | Delta Health Systems—East Bay Drayage Drivers |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 27 | 24 | 24
Health and Welfare Fund | Employer—Teamster Local Nos. 175 & 505 |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 10 | 9 | 9
Health and Welfare Fund | Joint Council 83 Health & Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 28 | 26 | 24
Health and Welfare Fund | Local 191 Teamsters Health Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 11 | 11 | 9
Health and Welfare Fund | Local 401 Teamsters Health & Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 7 | 7 | 6
Health and Welfare Fund | Local 804 Welfare Trust Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 75 | 70 | 67
Health and Welfare Fund | Milwaukee Drivers Pension Trust Fund—Milwaukee Drivers Health and Welfare Trust Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 34 | 32 | 31
Health and Welfare Fund | Montana Teamster Employers Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 7 | 7 | 6
Health and Welfare Fund | New York State Teamsters Health & Hospital Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 53 | 51 | 46
Health and Welfare Fund | North Coast Benefit Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 8 | 9 | 8
Health and Welfare Fund | Northern California General Teamsters (DELTA) |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 108 | 96 | 84
Health and Welfare Fund | Northern New England Benefit Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 42 | 39 | 35
Health and Welfare Fund | Oregon / Teamster Employers Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 31 | 29 | 28
Health and Welfare Fund | Teamsters 170 Health & Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 15 | 15 | 12
Health and Welfare Fund | Teamsters Benefit Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 36 | 40 | 38
Health and Welfare Fund | Teamsters Local 251 Health & Insurance Plan |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 13 | 12 | 11
Health and Welfare Fund | Teamsters Local 404 Health & Insurance Plan |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 7 | 7 | 6
Health and Welfare Fund | Teamsters Local 638 Health Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 39 | 35 | 32
Health and Welfare Fund | Teamsters Local 639—Employers Health & Pension Trust Funds |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 26 | 26 | 24
Health and Welfare Fund | Teamsters Local 671 Health Services & Insurance Plan |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 15 | 14 | 13
Health and Welfare Fund | Teamsters Union 25 Health Services & Insurance Plan |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 46 | 44 | 37
Health and Welfare Fund | Teamsters Union Local 677 Health Services & Insurance Plan |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 10 | 9 | 8
Health and Welfare Fund | Truck Drivers and Helpers Local 355 Baltimore Area Health & Welfare Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 15 | 15 | 13
Health and Welfare Fund | Utah-Idaho Teamsters Security Fund |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 25 | 22 | 18
Health and Welfare Fund | Washington Teamsters Welfare Trust |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | 44 | 36 | 35
Health and Welfare Fund | All Other Multiemployer Health and Welfare Plans |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
UPS Contributions |  |  |  |  | $ 95 | $ 64 | $ 44
National Master Agreement (NMA) [Domain] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments |  | 1,066 |  | $ 1,066 |  |  |
Non-National Master Agreement (Non-NMA) [Domain] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments | 36 |  | $ 36 |  |  |  |
DefinedBenefitPlanRecognizedNetGainLossDuetoSettlementsandCurtailmentsAfterTax | $ 22 |  |  |  |  |  |
remeasurement of postretirement obligation [Member] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments |  | 746 |  |  |  |  |
partial plan curtailment [Member] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments |  | 112 |  |  |  |  |
defined benefit plan settlement losses [Member] | National Master Agreement (NMA) [Domain] |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments |  | $ 208 |  |  |  |  |

X
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