Accumulated Other Comprehensive Loss and Shareholders' Equity - Accumulated Other Comprehensive (Loss) Income Activity (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 703	$ 2,225
Other comprehensive (loss) income before reclassifications	(370)	32
Reclassification of (income) losses	(8)	(1)
Net other comprehensive (loss) income	(378)	31
Balance at end of period	(20)	1,603
Other comprehensive income (loss) before reclassification related to foreign current translation adjustment, loss on intra-equity foreign currency transaction	11	8
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(368)	(403)
Other comprehensive (loss) income before reclassifications	(383)	33
Reclassification of (income) losses	0	0
Net other comprehensive (loss) income	(383)	33
Balance at end of period	(751)	(370)
Derivative Instrument and Other Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	7	12
Other comprehensive (loss) income before reclassifications	13	(1)
Reclassification of (income) losses	(8)	(1)
Net other comprehensive (loss) income	5	(2)
Balance at end of period	12	10
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(361)	(391)
Net other comprehensive (loss) income	(378)	31
Balance at end of period	$ (739)	$ (360)