Annual report pursuant to Section 13 and 15(d)

GOODWILL AND INTANGIBLE ASSETS - Allocation of Goodwill by Reportable Segment (Detail)

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GOODWILL AND INTANGIBLE ASSETS - Allocation of Goodwill by Reportable Segment (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Line Items]      
Beginning Balance $ 3,813,000,000 $ 3,811,000,000  
Acquired 0 5,000,000  
Goodwill, Impairment Loss (494,000,000) 0 $ 0
Currency / Other 48,000,000 (3,000,000)  
Ending Balance 3,367,000,000 3,813,000,000 3,811,000,000
U.S. Domestic Package      
Goodwill [Line Items]      
Beginning Balance 715,000,000 715,000,000  
Acquired 0 0  
Goodwill, Impairment Loss 0    
Currency / Other 0 0  
Ending Balance 715,000,000 715,000,000 715,000,000
International Package      
Goodwill [Line Items]      
Beginning Balance 416,000,000 417,000,000  
Acquired 0 2,000,000  
Goodwill, Impairment Loss 0    
Currency / Other 6,000,000 (3,000,000)  
Ending Balance 422,000,000 416,000,000 417,000,000
Supply Chain & Freight      
Goodwill [Line Items]      
Beginning Balance 2,682,000,000 2,679,000,000  
Acquired 0 3,000,000  
Goodwill, Impairment Loss (494,000,000)    
Currency / Other 42,000,000 0  
Ending Balance $ 2,230,000,000 $ 2,682,000,000 $ 2,679,000,000