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Intangible Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, cost $ 1,089 $ 1,046
Intangible assets, net $ 484 560
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 9 years  
Intangible Assets, cost $ 429 415
Intangible Assets, accumulated depreciation $ (216) (191)
Computer software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 1 year  
Intangible Assets, cost $ 396 291
Intangible Assets, accumulated depreciation $ (310) (219)
Patent And License [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 11 years  
Intangible Assets, cost $ 264 340
Intangible Assets, accumulated depreciation $ (79) $ (76)