Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Interest Rate Caps [Member] Maximum [Member]	Jun. 30, 2014 Foreign Currency Contracts [Member]	Jun. 30, 2014 Foreign Currency Contracts [Member]	Jun. 30, 2014 Foreign Exchange Contracts [Member]	Jun. 30, 2013 Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Reduction percentage of the principal amount of debt being hedged	100.00%
Announcement of proposed refinancing of its capital structure	Aug. 01, 2014
Accumulated realizing losses	$ 8
Net asset position related to derivative financial instruments	5
Transactions period of derivative contracts		1 year	3 years
Payments to settle foreign currency derivative contracts							7
Proceeds from settlement of foreign currency derivative contracts						3
Probability of default percentage	2.00%
Credit default recovery rate percentage	20.00%
Credit risk fair value adjustments	15.00%
Change in unobservable inputs percentage	10.00%
Gain for the period included in Net income ( Loss)				$ 1	$ 2