Other Comprehensive (Loss) Income and Shareholders' Equity - Accumulated Other Comprehensive (Loss) Income Activity (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			$ 5,357
Other comprehensive income (loss) before reclassifications			340	$ 21
Amounts reclassified from accumulated other comprehensive loss			1	2
Total other comprehensive income, net of tax	$ 156	$ 4	341	23
Balance at end of period	4,901		4,901
Other comprehensive income (loss) before reclassification related to foreign current translation adjustment, loss on intra-equity foreign currency transaction			106	3
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(503)	(192)
Other comprehensive income (loss) before reclassifications			350	25
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income, net of tax			350	25
Balance at end of period	(153)	(167)	(153)	(167)
Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(5)	(8)
Other comprehensive income (loss) before reclassifications			(8)	(4)
Amounts reclassified from accumulated other comprehensive loss			1	2
Total other comprehensive income, net of tax			(7)	(2)
Balance at end of period	(12)	(10)	(12)	(10)
Available-For-Sale Securities Unrealized Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			6	4
Other comprehensive income (loss) before reclassifications			(2)	0
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income, net of tax			(2)	0
Balance at end of period	4	4	4	4
Pension and Postretirement Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			5	0
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive loss			0	0
Total other comprehensive income, net of tax			0	0
Balance at end of period	5	0	5	0
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(497)	(196)
Total other comprehensive income, net of tax			341
Balance at end of period	$ (156)	$ (173)	$ (156)	$ (173)