Accumulated Other Comprehensive Income (Loss) - Derivative (Detail) - Derivative Instruments [Member] - Foreign Currency Derivatives [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Outstanding derivatives			$ 0
Foreign currency derivatives	$ (11)	$ 50
Tax (expense) benefit	4	(20)
Net of tax (provision) benefit	$ (7)	$ 30