Financial Instruments, Derivatives and Fair Value Measures - Carrying Value and Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair value, asset and liability measures
Long-term Investments	$ 883	$ 897
Foreign currency forward exchange contracts, receivable position	196	114
Foreign currency forward exchange contracts, (payable) position	(635)	(195)
Equity securities
Fair value, asset and liability measures
Long-term Investments	836	856
Carrying Value
Fair value, asset and liability measures
Total Long-Term debt	(17,938)	(19,366)
Foreign currency forward exchange contracts, receivable position	148	114
Foreign currency forward exchange contracts, (payable) position	(89)	(95)
Interest rate hedge contracts, receivable position	48
Interest rate hedge contract, (payable) position		(100)
Carrying Value \| Equity securities
Fair value, asset and liability measures
Long-term Investments	836	856
Carrying Value \| Other
Fair value, asset and liability measures
Long-term Investments	47	41
Fair Value
Fair value, asset and liability measures
Total Long-Term debt	(20,772)	(19,871)
Foreign currency forward exchange contracts, receivable position	148	114
Foreign currency forward exchange contracts, (payable) position	(89)	(95)
Interest rate hedge contracts, receivable position	48
Interest rate hedge contract, (payable) position		(100)
Fair Value \| Equity securities
Fair value, asset and liability measures
Long-term Investments	836	856
Fair Value \| Other
Fair value, asset and liability measures
Long-term Investments	$ 47	$ 41

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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