Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail)

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DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail) (Cash Flow Hedging, USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) $ (68) $ (42)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 63 (98)
Interest rate contracts | Interest Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) (71) (6)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (22) (19)
Foreign exchange contracts | Interest Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) 84 (85)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 24 13
Foreign exchange contracts | Other Operating Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) (5) 5
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) (76) 35
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 61 (101)
Commodity contracts | Fuel Expense
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) 0 9
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) $ 0 $ 9