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Accumulated Other Comprehensive Income (Loss) - Summary of Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]      
Accumulated other comprehensive income (loss), Beginning balance $ (45)    
Other comprehensive loss (89) $ (45) $ (18)
Accumulated other comprehensive income (loss), Ending balance $ (134) $ (45)