v2.4.0.6
Derivative and Financial Instruments - FX GainLoss (Details 4) (Foreign currency transaction (gains) losses [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Foreign currency transaction (gains) losses [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Foreign currency transaction (gains) losses $ (39) $ (11) $ (129) $ (15)