v2.4.0.6
Long-Term Debt (Details 2) (USD $)
In Millions, unless otherwise specified
1 Months Ended 12 Months Ended
Jul. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Principal Maturities of Long-Term Debt        
2012   $ 14    
2013   628    
2014   570    
2015   437    
2016   765    
Thereafter   882    
Total   3,296    
Unamortized gain on interest rate swaps recorded in long-term portion of debt   66    
Loss on extinguishment of debt     90  
Aggregate principal amount 827 2,794 3,227 2,242
Interest paid, net of capitalization   $ 208 $ 247 $ 284