Schedule of Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Cash Flow Hedges	Sep. 30, 2013 Cash Flow Hedges	Sep. 30, 2014 Foreign Currency Translation	Sep. 30, 2013 Foreign Currency Translation	Sep. 30, 2014 Other	Dec. 31, 2013 Other	Sep. 30, 2013 Other	Dec. 31, 2012 Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at Beginning of the period			$ (60)	$ (60)	$ (49)	$ (57)	$ (9)	$ (1)	$ (2)	$ (2)	$ (2)	$ (2)
Other comprehensive (loss) income before reclassifications			(3)	(10)	1	(2)	(4)	(8)
Amounts reclassified from accumulated other comprehensive loss			6	7	6	7
Total other comprehensive (loss) income	(8)	4	3	(3)	7	5	(4)	(8)
Balance at End of the period	$ (57)	$ (63)	$ (57)	$ (63)	$ (42)	$ (52)	$ (13)	$ (9)	$ (2)	$ (2)	$ (2)	$ (2)