v2.4.0.6
Derivative Instruments (Details 1) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Effective portion of the unrealized gain (loss) recognized in Other Comprehensive Income for our derivative instruments designated as cash flow hedges contracts [Abstract]      
Unrealized gain (loss) on derivative instruments recognized in Other Comprehensive Income, effective portion, net $ 15 $ (51) $ 186
Foreign currency contracts [Member]
     
Effective portion of the unrealized gain (loss) recognized in Other Comprehensive Income for our derivative instruments designated as cash flow hedges contracts [Abstract]      
Unrealized gain (loss) on derivative instruments recognized in Other Comprehensive Income, effective portion, net (63) (25) 191
Cross currency swap contracts [Member]
     
Effective portion of the unrealized gain (loss) recognized in Other Comprehensive Income for our derivative instruments designated as cash flow hedges contracts [Abstract]      
Unrealized gain (loss) on derivative instruments recognized in Other Comprehensive Income, effective portion, net 85 (26) 0
Forward interest rate contracts [Member]
     
Effective portion of the unrealized gain (loss) recognized in Other Comprehensive Income for our derivative instruments designated as cash flow hedges contracts [Abstract]      
Unrealized gain (loss) on derivative instruments recognized in Other Comprehensive Income, effective portion, net $ (7) $ 0 $ (5)