Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (338)
Other comprehensive income before reclassifications	1
Amounts reclassified from accumulated other comprehensive income	4
Other comprehensive income, Before-Tax Amount	5	8	(64)
Tax (expense) benefit	(2)	2
Total other comprehensive income (loss), net of taxes	3	10	(64)
Ending balance	(335)	(338)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(1)
Other comprehensive income before reclassifications
Amounts reclassified from accumulated other comprehensive income	1
Other comprehensive income, Before-Tax Amount	1
Tax (expense) benefit
Total other comprehensive income (loss), net of taxes	1
Ending balance
Defined Benefit Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(86)
Other comprehensive income before reclassifications	21
Amounts reclassified from accumulated other comprehensive income	3
Other comprehensive income, Before-Tax Amount	24
Tax (expense) benefit	(2)
Total other comprehensive income (loss), net of taxes	22
Ending balance	(64)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(251)
Other comprehensive income before reclassifications	(20)
Amounts reclassified from accumulated other comprehensive income
Other comprehensive income, Before-Tax Amount	(20)
Tax (expense) benefit
Total other comprehensive income (loss), net of taxes	(20)
Ending balance	$ (271)