Location on the Balance Sheet of Derivative Assets and Liabilities (Detail) - Fair Value, Inputs, Level 2 - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Asset Derivatives
Asset Derivatives	$ 214	$ 126
Net Amounts if Right of Offset had been Applied	158	81
Derivative Liabilities [Abstract]
Liability Derivatives	66	192
Net Amounts if Right of Offset had been Applied	10	147
Designated as Hedging Instrument | Foreign currency exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	94	56
Net Amounts if Right of Offset had been Applied	76	45
Designated as Hedging Instrument | Foreign currency exchange contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	102	35
Net Amounts if Right of Offset had been Applied	66	4
Designated as Hedging Instrument | Foreign currency exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	19	34
Net Amounts if Right of Offset had been Applied	1	23
Designated as Hedging Instrument | Foreign currency exchange contracts | Long-term debt and finance leases
Derivative Liabilities [Abstract]
Liability Derivatives	36	142
Net Amounts if Right of Offset had been Applied	0	111
Designated as Hedging Instrument | Interest rate contracts | Other current assets
Asset Derivatives
Asset Derivatives	0	2
Net Amounts if Right of Offset had been Applied	0	2
Designated as Hedging Instrument | Interest rate contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	17	29
Net Amounts if Right of Offset had been Applied	15	26
Designated as Hedging Instrument | Interest rate contracts | Long-term debt and finance leases
Derivative Liabilities [Abstract]
Liability Derivatives	11	13
Net Amounts if Right of Offset had been Applied	9	10
Not Designated as Hedging Instrument | Foreign currency exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	1	4
Net Amounts if Right of Offset had been Applied	1	4
Not Designated as Hedging Instrument | Foreign currency exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	2
Net Amounts if Right of Offset had been Applied	0	2
Not Designated as Hedging Instrument | Interest rate contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	1
Net Amounts if Right of Offset had been Applied	$ 0	$ 1