Derivatives and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Number of foreign exchange options outstanding	0	0	0
Number of interest rate and currency swap agreements outstanding	0	0	0
Foreign exchange option [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum original maturity period of foreign currency forward contracts		12 months
Foreign currency forward contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Estimated fair value of foreign currency forward contract, liability		$ 25
Estimated fair value of foreign currency forward contract, asset	15		15
Interest rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash received from terminated interest rate swaps	7
Mark-to-market adjustment to record an increase in carrying amount of our 12% Senior Notes			2
Designated as hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase in carrying amount due to interest rate swap	6
Decrease (Increase) in interest expense due to interest rate swap	1	1	3
5.625 % Senior Notes due July 2013 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt interest rate	5.625%	5.625%	5.625%
12% Senior Notes due February 2014 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt interest rate	12.00%	12.00%	12.00%
Cash received from terminated interest rate swaps		$ 2