v2.4.0.6
Debt (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Nov. 20, 2011
Aug. 28, 2011
Debt Instrument [Line Items]    
Amount of private placement $ 2,230 $ 2,153
1.18% Fixed Rate Note Due October 2018 [Member]
   
Debt Instrument [Line Items]    
Amount of private placement 78 0
Funding amount $ 52  
Loan interest rate, fixed 1.18%  
Debt instrument, principal due date October 2018