Location on the Balance Sheet of Derivative Assets and Liabilities (Detail) - Fair Value, Inputs, Level 2 - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Asset Derivatives
Asset Derivatives	$ 312	$ 432
Net Amounts if Right of Offset had been Applied	289	407
Derivative Liabilities [Abstract]
Liability Derivatives	38	37
Net Amounts if Right of Offset had been Applied	15	12
Designated as Hedging Instrument | Foreign exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	121	138
Net Amounts if Right of Offset had been Applied	116	131
Designated as Hedging Instrument | Foreign exchange contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	138	252
Net Amounts if Right of Offset had been Applied	124	236
Designated as Hedging Instrument | Foreign exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	5	7
Net Amounts if Right of Offset had been Applied	0	0
Designated as Hedging Instrument | Foreign exchange contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	14	16
Net Amounts if Right of Offset had been Applied	0	0
Designated as Hedging Instrument | Interest rate contracts | Other current assets
Asset Derivatives
Asset Derivatives	11	2
Net Amounts if Right of Offset had been Applied	11	2
Designated as Hedging Instrument | Interest rate contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	33	21
Net Amounts if Right of Offset had been Applied	30	20
Designated as Hedging Instrument | Interest rate contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	14	11
Net Amounts if Right of Offset had been Applied	11	10
Not Designated as Hedging Instrument | Foreign exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	2	7
Net Amounts if Right of Offset had been Applied	2	7
Not Designated as Hedging Instrument | Foreign exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	1	0
Net Amounts if Right of Offset had been Applied	1	0
Not Designated as Hedging Instrument | Interest rate contracts | Other current assets
Asset Derivatives
Asset Derivatives	7	0
Net Amounts if Right of Offset had been Applied	6	0
Not Designated as Hedging Instrument | Interest rate contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	0	12
Net Amounts if Right of Offset had been Applied	0	11
Not Designated as Hedging Instrument | Interest rate contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	4	0
Net Amounts if Right of Offset had been Applied	3	0
Not Designated as Hedging Instrument | Interest rate contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	3
Net Amounts if Right of Offset had been Applied	$ 0	$ 2