XML 104 R103.htm IDEA: XBRL DOCUMENT v2.4.0.6
Derivative Financial Instruments - Derivative Fair Values in Consolidated Balance Sheet for Cash Flow Hedges (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Derivative financial assets [Member]
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value, Cash Flow Hedges $ (6) $ (113)
Derivative Related Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives Fair Value, Cash Flow Hedges 0 0
Interest rate swaps [Member] | Derivative financial assets [Member]
   
Derivatives, Fair Value [Line Items]    
Interest Rate Derivative Assets, at Fair Value (450) [1] (554) [1]
Interest rate swaps [Member] | Derivative Related Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Interest Rate Derivative Liabilities, at Fair Value 0 0
Currency swaps [Member] | Derivative financial assets [Member]
   
Derivatives, Fair Value [Line Items]    
Currency Swaps Hedge Asset at Fair Value 444 [1] 441 [1]
Currency swaps [Member] | Derivative Related Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Currency Swaps Hedge Liability at Fair Value $ 0 $ 0
[1] At December 31, 2012 and December 31, 2011, derivative financial assets are reported on our consolidated balance sheet within other assets.