Stockholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (508)
Other comprehensive income (loss) before reclassifications	(108)
Amounts reclassified from accumulated other comprehensive loss	1
Total before tax	(107)
Tax expense	(3)
Total other comprehensive income (loss), net of taxes	(110)
Ending balance	(618)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	3
Other comprehensive income (loss) before reclassifications	4
Total before tax	4
Tax expense	(3)
Total other comprehensive income (loss), net of taxes	1
Ending balance	4
Defined Benefit Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(77)
Amounts reclassified from accumulated other comprehensive loss	1
Total before tax	1
Total other comprehensive income (loss), net of taxes	1
Ending balance	(76)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(434)
Other comprehensive income (loss) before reclassifications	(112)
Total before tax	(112)
Total other comprehensive income (loss), net of taxes	(112)
Ending balance	$ (546)