Annual report pursuant to Section 13 and 15(d)

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

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MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - Multi-Employer Health and Welfare Plans (Detail) - Health and Welfare Fund - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Multiemployer Plans [Line Items]      
UPS Contributions $ 4,268 $ 3,972 $ 3,761
Bay Area Delivery Drivers      
Multiemployer Plans [Line Items]      
UPS Contributions 40 37 35
Central Pennsylvania Teamsters Health & Pension Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 29 27 25
Central States, South East & South West Areas Health and Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 2,530 2,366 2,268
Teamsters Western Region & Local One Seventy Seven Health Care Plan [Member]      
Multiemployer Plans [Line Items]      
UPS Contributions 656 605 571
Health & Welfare Insurance Fund Teamsters Local Six Fifty Three [Member]      
Multiemployer Plans [Line Items]      
UPS Contributions 8 7 6
Delta Health Systems—East Bay Drayage Drivers      
Multiemployer Plans [Line Items]      
UPS Contributions 30 29 27
Employer—Teamster Local Nos. 175 & 505      
Multiemployer Plans [Line Items]      
UPS Contributions 12 11 11
General Teamsters Local 493 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 6 5 5
Joint Council 83 Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 40 37 33
Local 191 Teamsters Health Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 13 13 12
Local 401 Teamsters Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 10 9 8
Local 443 Transportation Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 6 5 5
Local 804 Welfare Trust Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 90 84 79
Milwaukee Drivers Pension Trust Fund—Milwaukee Drivers Health and Welfare Trust Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 43 38 36
Montana Teamster Employers Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 9 8 8
New York State Teamsters Health & Hospital Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 62 59 56
North Coast Benefit Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 12 11 8
Northern California General Teamsters (DELTA)      
Multiemployer Plans [Line Items]      
UPS Contributions 153 132 116
Northern New England Benefit Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 54 50 47
Oregon / Teamster Employers Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 43 38 34
Teamsters 170 Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 18 17 16
Teamsters Benefit Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 48 46 43
Teamsters Local 251 Health & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 17 15 14
Teamsters Local 404 Health & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 8 8 7
Teamsters Local 638 Health Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 48 43 40
Teamsters Local 639—Employers Health & Pension Trust Funds      
Multiemployer Plans [Line Items]      
UPS Contributions 29 27 27
Teamsters Local 671 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 19 17 17
Teamsters Union 25 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 56 52 50
Teamsters Union Local 677 Health Services & Insurance Plan      
Multiemployer Plans [Line Items]      
UPS Contributions 12 11 10
Truck Drivers and Helpers Local 355 Baltimore Area Health & Welfare Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 18 16 16
Utah-Idaho Teamsters Security Fund      
Multiemployer Plans [Line Items]      
UPS Contributions 32 29 26
Washington Teamsters Welfare Trust      
Multiemployer Plans [Line Items]      
UPS Contributions 57 52 47
All Other Multiemployer Health and Welfare Plans      
Multiemployer Plans [Line Items]      
UPS Contributions $ 60 $ 68 $ 58