Stockholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			$ (668)
Other comprehensive income (loss) before reclassifications			(3)
Amounts reclassified from accumulated other comprehensive income (loss)			203
Total before tax			200
Total other comprehensive income (loss), net of taxes	$ 177	$ 20	200	$ (90)
Ending balance	(468)		(468)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			1
Ending balance	1		1
Net Investment Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)			(1)
Total before tax			(1)
Total other comprehensive income (loss), net of taxes			(1)
Ending balance	(1)		(1)
Defined Benefit Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(79)
Amounts reclassified from accumulated other comprehensive income (loss)			1
Total before tax			1
Total other comprehensive income (loss), net of taxes			1
Ending balance	(78)		(78)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(590)
Other comprehensive income (loss) before reclassifications			(3)
Amounts reclassified from accumulated other comprehensive income (loss)			203
Total before tax			200
Total other comprehensive income (loss), net of taxes			200
Ending balance	$ (390)		$ (390)