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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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