Supplemental Oil and Gas Disclosures (Unaudited) (Schedule of Analysis of Changes in Standardized Measure) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]
Standardized measure, beginning of year	$ 37,588	$ 18,731	$ 1,847
Sales and transfers of natural gas and oil produced, net of production costs	(2,123)	(8,611)	(3,332)
Net changes in prices and production costs	(36,514)	23,198	10,417
Extensions, discoveries, and other additions, net of future production and development costs	63	4,976	3,183
Acquisition of reserves in place	0	1	6,499
Sales of reserves in place	(710)	(49)	(1)
Revisions of previous quantity estimates	(1,174)	(400)	596
Net change in income taxes	8,364	(5,158)	(3,689)
Changes in estimated future development costs	1,005	(709)	137
Previously estimated development costs incurred during the year	1,336	1,208	419
Changes in production rates (timing) and other	(5,165)	2,159	2,470
Accretion of discount	4,643	2,242	185
Standardized measure, end of year	$ 7,313	$ 37,588	$ 18,731