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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative liabilities	$ 747	$ 229
Recurring
Transfers into or out of Level 1 or Level 2 or Level 3	0	0
Total liabilities at fair value	873	347
Derivative liabilities	760	240
Recurring | Derivative Financial Instruments, Liabilities
Derivative liabilities	13	11
Nonrecurring
Total liabilities at fair value	$ 0	$ 0

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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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Fair value of financial and nonfinancial obligations.

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