Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Amount and Location in the Income Statement for Derivatives Designated as Fair Value Hedges (Detail)

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DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Amount and Location in the Income Statement for Derivatives Designated as Fair Value Hedges (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives $ 768 $ 721
Liability Derivatives (53) (77)
Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 502 435
Liability Derivatives (12) (34)
Price Risk Derivative [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 5 0
Liability Derivatives (9) 0
Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 261 286
Liability Derivatives (32) (43)
Fair Value, Inputs, Level 1    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 1 | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 1 | Price Risk Derivative [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 1 | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 2    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 768 721
Liability Derivatives (53) (77)
Fair Value, Inputs, Level 2 | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 502 435
Liability Derivatives (12) (34)
Fair Value, Inputs, Level 2 | Price Risk Derivative [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 5 0
Liability Derivatives (9) 0
Fair Value, Inputs, Level 2 | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 261 286
Liability Derivatives (32) (43)
Fair Value, Inputs, Level 3    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 3 | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 3 | Price Risk Derivative [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives 0 0
Fair Value, Inputs, Level 3 | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives 0 0
Liability Derivatives $ 0 $ 0