Accumulated Other Comprehensive (Loss) Income - Components of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized gains (losses) on sales hedging
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (1)	$ 5	$ (2)
Components of AOCI
Other comprehensive (loss) income before reclassifications	1	7	8
Reclassification from AOCI	7	(15)	1
Tax benefit (expense)	(1)	2	(2)
Other comprehensive (loss) income	7	(6)	7
Ending balance	6	(1)	5
Unrealized gains (losses) on forward interest rate swaps
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(15)	(8)	0
Components of AOCI
Other comprehensive (loss) income before reclassifications	(1)	(12)	(12)
Reclassification from AOCI	2	1	0
Tax benefit (expense)	(1)	4	4
Other comprehensive (loss) income	0	(7)	(8)
Ending balance	(15)	(15)	(8)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(32)	(6)	(7)
Components of AOCI
Other comprehensive (loss) income before reclassifications	(4)	(11)	1
Reclassification from AOCI	0	(15)	0
Tax benefit (expense)	0	0	0
Other comprehensive (loss) income	(4)	(26)	1
Ending balance	(36)	(32)	(6)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(48)	(9)	(9)
Components of AOCI
Other comprehensive (loss) income before reclassifications	(4)	(16)	(3)
Reclassification from AOCI	9	(29)	1
Tax benefit (expense)	(2)	6	2
Other comprehensive (loss) income	3	(39)	0
Ending balance	$ (45)	$ (48)	$ (9)