Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
MULTIEMPLOYER EMPLOYEE BENEFIT PLANS - UPS's Participation in Multiemployer Plans (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Employees
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2012
Employees
Multiemployer Plans [Line Items]        
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamster | Employees 327,000      
Number of pilots under a collective bargaining agreement with the Independent Pilots Association | Employees 3,000      
Employees Not Employed Under Agreement With Teamsters | Employees 3,400      
Ground Mechanics Employed Under IAM Agreements | Employees 1,600      
Represented by Teamsters [Member]        
Multiemployer Plans [Line Items]        
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamster | Employees       10,200
Pension Benefits        
Multiemployer Plans [Line Items]        
Multiemployer Plans, Period Contributions, Significance of Contributions 5.00% 5.00% 5.00%  
Multiemployer pension plans, maximum term to forecast a funding deficiency in the orange zone 6 years      
Multi-employer plans, fair value of withdrawal liability $ 1,000 $ 929    
Debt Instrument, Term 42 years      
Multiemployer Plan, Employer Contribution, Cost $ 2,555 $ 2,220 $ 2,042  
Pension Benefits | Central Pennsylvania Teamsters Defined Benefit Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 23-6262789-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 57 $ 48 44  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Employer-Teamsters Local Nos. 175 & 505 Pension Trust Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 55-6021850-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 16 $ 14 13  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Hagerstown Motor Carriers and Teamsters Pension Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 52-6045424-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 11 $ 10 9  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | I.A.M. National Pension Fund / National Pension Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 51-6031295-002      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Green    
Multiemployer Plan, Employer Contribution, Cost $ 44 $ 41 38  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | International Brotherhood of Teamsters Union Local No. 710 Pension Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 36-2377656-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 161 $ 142 129  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Local 705, International Brotherhood of Teamsters Pension Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 36-6492502-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Yellow Yellow    
Multiemployer Plan, Employer Contribution, Cost $ 120 $ 113 104  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Local 804 I.B.T. & Local 447 I.A.M.—UPS Multiemployer Retirement Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 51-6117726-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Yellow Yellow    
Multiemployer Plan, Employer Contribution, Cost $ 124 $ 112 116  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Milwaukee Drivers Pension Trust Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 39-6045229-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 53 $ 48 42  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | New England Teamsters & Trucking Industry Pension Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 04-6372430-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 140 $ 120 121  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | New York State Teamsters Conference Pension and Retirement Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 16-6063585-074      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 135 $ 119 108  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Teamster Pension Fund of Philadelphia and Vicinity        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 23-1511735-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Yellow Yellow    
Multiemployer Plan, Employer Contribution, Cost $ 85 $ 74 66  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Teamsters Joint Council No. 83 of Virginia Pension Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 54-6097996-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 82 $ 75 69  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Teamsters Local 639—Employers Pension Trust        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 53-0237142-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 74 $ 68 61  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Teamsters Negotiated Pension Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 43-6196083-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 40 $ 37 34  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Truck Drivers and Helpers Local Union No. 355 Retirement Pension Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 52-6043608-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 27 $ 24 22  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | United Parcel Service, Inc.—Local 177, I.B.T. Multiemployer Retirement Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 13-1426500-419      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 107 $ 100 95  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | Western Conference of Teamsters Pension Plan        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 91-6145047-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Green Green    
Multiemployer Plan, Employer Contribution, Cost $ 1,138 $ 939 868  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] NA      
Pension Benefits | Western Pennsylvania Teamsters and Employers Pension Fund        
Multiemployer Plans [Line Items]        
EIN / Pension Plan Number 25-6029946-001      
Surcharge Imposed No      
Multiemployer Plan, Pension, Insignificant, Certified Zone Status [Fixed List] Red Red    
Multiemployer Plan, Employer Contribution, Cost $ 37 $ 34 31  
Multiemployer Plan, Pension, Insignificant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List] Implemented      
Pension Benefits | All Other Multiemployer Pension Plans        
Multiemployer Plans [Line Items]        
Multiemployer Plan, Employer Contribution, Cost $ 104 102 $ 72  
Pension Benefits | Green Zone, At Least 80% Funded [Member] | Minimum        
Multiemployer Plans [Line Items]        
Multiemployer pension plans, percentage of plan funded 80.00%      
Pension Benefits | Red Zone, Less than 65% Funded [Member] | Maximum        
Multiemployer Plans [Line Items]        
Multiemployer pension plans, percentage of plan funded 65.00%      
Pension Benefits | Otange Zone, Less than 80% and Have an Accumulated Funding Deficiency or Expect to Have a Deficiency Within Six Years [Member]        
Multiemployer Plans [Line Items]        
Multiemployer pension plans, percentage of plan funded 80.00%      
Pension Benefits | Yellow Zone, Less than 80% Funded [Member] | Maximum        
Multiemployer Plans [Line Items]        
Multiemployer pension plans, percentage of plan funded 80.00%      
Other non-current liabilities | Pension Benefits        
Multiemployer Plans [Line Items]        
Multiemployer plans, present value of withdrawal liability $ 837 845    
Other current liabilities | Pension Benefits        
Multiemployer Plans [Line Items]        
Multiemployer plans, present value of withdrawal liability $ 7 $ 7    
UPS Freight        
Multiemployer Plans [Line Items]        
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamster | Employees 11,000