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
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Inputs, Level 2    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives $ 432 $ 361
Liability Derivatives (37) (67)
Revenue [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0 0
Gain (Loss) on Fair Value Of Derivatives Designated As Hedged Item Recognized in Earnings 0 0
Other Comprehensive Income (Loss) Gain (Loss), after Reclassification and Tax, Parent 177 (50)
Revenue [Member] | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 177 (50)
Revenue [Member] | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 0 0
Interest Expense [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Fair Value Hedges Recognized in Earnings (38) 57
Gain (Loss) on Fair Value Of Derivatives Designated As Hedged Item Recognized in Earnings 38 (57)
Other Comprehensive Income (Loss) Gain (Loss), after Reclassification and Tax, Parent (15) (24)
Interest Expense [Member] | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 0 0
Interest Expense [Member] | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (15) (24)
Investment Income [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0 0
Gain (Loss) on Fair Value Of Derivatives Designated As Hedged Item Recognized in Earnings 0 0
Other Comprehensive Income (Loss) Gain (Loss), after Reclassification and Tax, Parent 0 0
Investment Income [Member] | Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 0 0
Investment Income [Member] | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax $ 0 $ 0