Quarterly report pursuant to Section 13 or 15(d)

Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail)

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Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail) (Cash Flow Hedging, USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) $ (67) $ (85)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (1) 16
Interest Rate Contracts | Interest Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) (8) 0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (5) (5)
Foreign Exchange Contracts | Interest Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) 41 18
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 16 34
Foreign Exchange Contracts | Other Operating Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) (5) 0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 0 0
Foreign Exchange Contracts | Revenue
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) (95) (103)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) $ (12) $ (13)