v2.4.0.6
Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases and Capital Leases (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Operating And Capital Leases Future Minimum Payments Due [Line Items]    
2013 $ 30  
2014 29  
2015 27  
2016 18  
2017 12  
Thereafter 37  
Total future minimum leases payments 153 171
2013 7  
2014 7  
2015 2  
2016 1  
2017 1  
Thereafter     
Total future minimum leases payments 18  
Less: amount representing interest 2  
Present value of future minimum lease payments $ 16