Supplemental Information on Oil and Gas Operations (Unaudited) (Results Of Operations) (Details) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($) $ / Boe	Dec. 31, 2021 USD ($) $ / Boe	Dec. 31, 2020 USD ($) $ / Boe
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Oil, gas and NGL sales	$ 14,082	$ 9,531	$ 2,695
Production expenses	(2,797)	(2,131)	(1,123)
Exploration expenses	(29)	(14)	(167)
Depreciation, depletion and amortization	(2,119)	(2,050)	(1,207)
Asset dispositions	43	170
Asset impairments			(2,664)
Accretion of asset retirement obligations	(25)	(28)	(20)
Income tax expense	(2,041)	(1,238)
Results of operations	$ 7,114	$ 4,240	$ (2,486)
Depreciation, depletion and amortization per Boe \| $ / Boe	9.52	9.83	9.90

Amortization computed on the basis of physical units, with oil and gas converted to a common unit of measure on the basis of their approximate relative energy content.

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