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Financial Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Total derivatives	$ 59		$ 38
Derivatives Designated as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Total derivatives	61		37
Foreign currency forward-exchange contracts \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Total derivatives	(2)		1
Foreign currency forward-exchange contracts	(6)	$ (5)
Foreign currency forward-exchange contracts \| Derivatives Not Designated as Hedging Instruments \| Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	21		16
Foreign currency forward-exchange contracts \| Derivatives Not Designated as Hedging Instruments \| Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	(23)		(15)
Forward-starting interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	40		0
Forward-starting interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	5		17
Forward-starting interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0		5
Cross-currency interest rate swap contracts \| Derivatives Designated as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Collateral received	23
Collateral posted	7		23
Cross-currency interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	15		12
Cross-currency interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	1		3
Cross-currency interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	15		14
Fixed-to-floating interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0		2
Fixed-to-floating interest rate swap contracts \| Derivatives Designated as Hedging Instruments: \| Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets	$ (13)		$ 0