Supplemental Oil and Gas Disclosures (Unaudited) (Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / Mcfe	Dec. 31, 2022 USD ($) $ / Mcfe	Dec. 31, 2021 USD ($) $ / Mcfe
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Unproved property acquisition costs	$ 184	$ 202	$ 139
Exploration costs	0	0	0
Development costs	1,939	2,021	984
Capitalized costs incurred	$ 2,123	$ 2,223	$ 1,123
Full cost pool amortization (in dollars per mcfe) | $ / Mcfe	0.77	0.67	0.42