Financial Instruments, Derivatives and Fair Value Measures - Carrying Value and Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair value, asset and liability measures
Long-term Investments	$ 816	$ 821
Foreign currency forward exchange contracts, receivable position	379	300
Foreign currency forward exchange contracts, (payable) position	(618)	(1,075)
Equity securities
Fair value, asset and liability measures
Long-term Investments	748	776
Carrying value
Fair value, asset and liability measures
Total long-Term debt	(18,050)	(18,534)
Foreign currency forward exchange contracts, receivable position	292	90
Foreign currency forward exchange contracts, (payable) position	(97)	(498)
Interest rate hedge contracts, receivable position	87	210
Carrying value \| Equity securities
Fair value, asset and liability measures
Long-term Investments	748	776
Carrying value \| Other Security Investments [Member]
Fair value, asset and liability measures
Long-term Investments	68	45
Fair value
Fair value, asset and liability measures
Total long-Term debt	(21,152)	(22,809)
Foreign currency forward exchange contracts, receivable position	292	90
Foreign currency forward exchange contracts, (payable) position	(97)	(498)
Interest rate hedge contracts, receivable position	87	210
Fair value \| Equity securities
Fair value, asset and liability measures
Long-term Investments	748	776
Fair value \| Other Security Investments [Member]
Fair value, asset and liability measures
Long-term Investments	$ 68	$ 45

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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+ References

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Fair value as of the balance sheet date of all derivative assets designated as interest rate fair value hedging instruments.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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