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Intangibles - Net Book Values of Identified Intangible Assets by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]    
Finite lived intangible assets, Beginning balance $ 73 $ 68
Additions 103 10
Amortization (13) (5)
Currency translation adjustments and other (2)  
Finite lived intangible assets, Ending balance 161 73
United States [Member]    
Finite Lived Intangible Assets [Line Items]    
Finite lived intangible assets, Beginning balance 57 50
Additions 43 10
Amortization (5) (3)
Finite lived intangible assets, Ending balance 95 57
Canada (Member)    
Finite Lived Intangible Assets [Line Items]    
Finite lived intangible assets, Beginning balance 1 2
Additions 2  
Amortization (1) (1)
Finite lived intangible assets, Ending balance 2 1
International [Member]    
Finite Lived Intangible Assets [Line Items]    
Finite lived intangible assets, Beginning balance 15 16
Additions 58  
Amortization (7) (1)
Currency translation adjustments and other (2)  
Finite lived intangible assets, Ending balance $ 64 $ 15