Organization and Summary of Significant Accounting Policies (Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Proved properties	$ 35,697	$ 33,546
Unproved properties	2,075	2,217
Total capitalized costs	37,772	35,763
Less:  Accumulated depreciation, depletion and amortization	(28,031)	(25,033)
Net capitalized costs	$ 9,741	$ 10,730