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MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - UPS's Participation in Multiemployer Plans (Details) - Pension Benefits - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Multiemployer Plans [Line Items] |  |  |
UPS Contributions and Accruals | $ 2,947 | $ 2,953 | $ 2,941
Alaska Teamster-Employer Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 11 | $ 10 | 10
Surcharge Imposed | No |  |
Central Pennsylvania Teamsters Defined Benefit Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 85 | $ 82 | 75
Surcharge Imposed | No |  |
Eastern Shore Teamsters Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 10 | $ 10 | 10
Surcharge Imposed | No |  |
Employer-Teamsters Local Nos. 175 & 505 Pension Trust Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 21 | $ 21 | 21
Surcharge Imposed | No |  |
Hagerstown Motor Carriers and Teamsters Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 13 | $ 13 | 13
Surcharge Imposed | No |  |
I.A.M. National Pension Fund / National Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 53 | $ 50 | 48
Surcharge Imposed | No |  |
International Brotherhood of Teamsters Union Local No. 710 Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 194 | $ 196 | 191
Surcharge Imposed | No |  |
Local 705, International Brotherhood of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 142 | $ 138 | 136
Surcharge Imposed | No |  |
Local 804 I.B.T. & Local 447 I.A.M.—UPS Multiemployer Retirement Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 139 | $ 143 | 144
Surcharge Imposed | No |  |
Milwaukee Drivers Pension Trust Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 62 | $ 62 | 62
Surcharge Imposed | No |  |
New England Teamsters & Trucking Industry Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 224 | $ 234 | 167
Surcharge Imposed | No |  |
New York State Teamsters Conference Pension and Retirement Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 136 | $ 139 | 149
Surcharge Imposed | No |  |
Teamster Pension Fund of Philadelphia and Vicinity |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 98 | $ 98 | 100
Surcharge Imposed | No |  |
Teamsters Joint Council No. 83 of Virginia Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 98 | $ 98 | 98
Surcharge Imposed | No |  |
Teamsters Local 639—Employers Pension Trust |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 83 | $ 84 | 85
Surcharge Imposed | No |  |
Teamsters Negotiated Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 47 | $ 49 | 49
Surcharge Imposed | No |  |
Truck Drivers and Helpers Local Union No. 355 Retirement Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 28 | $ 28 | 30
Surcharge Imposed | No |  |
United Parcel Service, Inc.—Local 177, I.B.T. Multiemployer Retirement Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 111 | $ 122 | 124
Surcharge Imposed | No |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
UPS Contributions and Accruals | $ 1,255 | $ 1,254 | 1,310
Surcharge Imposed | No |  |
Western Pennsylvania Teamsters and Employers Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
UPS Contributions and Accruals | $ 45 | $ 46 | 46
Surcharge Imposed | No |  |
All Other Multiemployer Pension Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
UPS Contributions and Accruals | $ 92 | $ 76 | $ 73

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