Annual report [Section 13 and 15(d), not S-K Item 405]

MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - Multi-Employer Health and Welfare Plans (Details)

v3.25.4
MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - Multi-Employer Health and Welfare Plans (Details) - Health and Welfare Fund - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals $ 6,503 $ 6,431 $ 6,268
Bay Area Delivery Drivers      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 47 41 40
Central Pennsylvania Teamsters Health & Pension Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 51 48 46
Central States, South East & South West Areas Health and Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 3,883 3,849 3,712
Delta Health Systems—East Bay Drayage Drivers      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 41 37 39
Joint Council #83 Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 61 63 63
Local 401 Teamsters Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 24 24 23
Local 804 Welfare Trust Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 135 131 131
Milwaukee Drivers Pension Trust Fund—Milwaukee Drivers Health and Welfare Trust Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 62 64 64
New York State Teamsters Health & Hospital Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 88 89 87
Northern California General Teamsters (DELTA)      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 209 202 206
Northern New England Benefit Trust      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 82 82 83
Oregon / Teamster Employers Trust      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 68 68 69
Teamsters 170 Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 22 22 21
Teamsters Benefit Trust      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 54 59 57
Teamsters Local 175 & 505 Health and Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 20 20 20
Teamsters Local 191 Health Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 31 30 29
Teamsters Local 251 Health & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 22 22 22
Teamsters Local 638 Health Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 74 74 73
Teamsters Local 639—Employers Health & Pension Trust Funds      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 36 35 36
Teamsters Local 671 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 24 24 24
Teamsters Union 25 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 75 73 73
Teamsters Western Region & Local 177 Health Care Plan      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 1,127 1,109 1,076
Truck Drivers and Helpers Local 355 Baltimore Area Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 20 21 23
Utah-Idaho Teamsters Security Fund      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 54 53 54
Washington Teamsters Welfare Trust      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals 82 83 88
All Other Multiemployer Health and Welfare Plans      
Multiemployer Plans [Line Items]      
UPS Contributions and Accruals $ 111 $ 108 $ 109