Financial and Other Derivative Instruments (Netting Offsets Reconciliation to Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative Assets
Derivative Assets	$ 1,391	$ 567
Collateral adjustment	(90)	(12)
Derivative asset, current	181	116
Derivative assets, noncurrent	90	40
Derivative Liabilities
Derivative Liabilities	(1,508)	(533)
Collateral adjustment	48	6
Derivative liabilities, current	(238)	(68)
Derivative liabilities, noncurrent	(192)	(60)
Current derivative asset
Derivative Assets
Derivative Assets	1,035	446
Counterparty netting	(791)	(318)
Collateral adjustment	(63)	(12)
Derivative asset, current	181	116
Noncurrent derivative asset
Derivative Assets
Derivative Assets	356	121
Counterparty netting	(239)	(81)
Collateral adjustment	(27)	0
Derivative assets, noncurrent	90	40
Current derivative liability
Derivative Liabilities
Derivative Liabilities	(1,037)	(386)
Counterparty netting	791	318
Collateral adjustment	8	0
Derivative liabilities, current	(238)	(68)
Noncurrent derivative liability
Derivative Liabilities
Derivative Liabilities	(471)	(147)
Counterparty netting	239	81
Collateral adjustment	40	6
Derivative liabilities, noncurrent	$ (192)	$ (60)

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