Annual report pursuant to Section 13 and 15(d)

MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - UPS's Participation in Multiemployer Plans (Details)

v3.25.0.1
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