Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Detail)

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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 6,007   $ 6,007   $ 5,743
Accumulated Amortization (3,783)   (3,783)   (3,469)
Net Carrying Value 2,224   2,224   2,274
Impairment of finite lived intangible assets 0 $ 0 7 $ 4  
Licenses          
Finite-Lived Intangible Assets [Line Items]          
Carrying value 4   4    
Trade name          
Finite-Lived Intangible Assets [Line Items]          
Carrying value 200   200    
Capitalized software          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 4,785   4,785   4,531
Accumulated Amortization (3,197)   (3,197)   (2,962)
Net Carrying Value 1,588   1,588   1,569
Licenses          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 101   101   100
Accumulated Amortization (59)   (59)   (37)
Net Carrying Value 42   42   63
Franchise rights          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 177   177   165
Accumulated Amortization (116)   (116)   (113)
Net Carrying Value 61   61   52
Customer relationships          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 722   722   729
Accumulated Amortization (393)   (393)   (344)
Net Carrying Value 329   329   385
Trade name          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 200   200   200
Accumulated Amortization 0   0   0
Net Carrying Value 200   200   200
Trademarks, patents and other          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 22   22   18
Accumulated Amortization (18)   (18)   (13)
Net Carrying Value $ 4   $ 4   $ 5