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Intangible Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, cost $ 986 $ 451
Intangible assets, net $ 621 169
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 12 years  
Intangible Assets, cost $ 392 134
Intangible Assets, accumulated depreciation $ (96) (53)
Computer software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 4 years  
Intangible Assets, cost $ 316 278
Intangible Assets, accumulated depreciation $ (242) (221)
Patent And License [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated weighted average useful life in years 15 years  
Intangible Assets, cost $ 278 39
Intangible Assets, accumulated depreciation $ (27) $ (8)