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Accumulated Other Comprehensive Income (Loss) - Summary of Components of Accumulated Other Comprehensive Income (Loss) (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
Accumulated other comprehensive income (loss), Beginning balance $ (142)
Accumulated other comprehensive income (loss), Ending balance (132)
Accumulated Other Comprehensive Income (Loss) [Member]  
Accumulated other comprehensive income (loss), Beginning balance (142)
Other comprehensive income 10
Accumulated other comprehensive income (loss), Ending balance $ (132)