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, 2020
Dec. 31, 2019
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 196 177
Revenue [Member] | Foreign currency exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 196 177
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 (8) (38)
Gain (Loss) on Fair Value Of Derivatives Designated As Hedged Item Recognized in Earnings 8 38
Other Comprehensive Income (Loss) Gain (Loss), after Reclassification and Tax, Parent (8) (15)
Interest Expense [Member] | Foreign currency 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 (8) (15)
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 currency 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