Property, Plant and Equipment (Summary of Property and Equipment, net) (Details) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023
Property and equipment:
Proved		$ 47,512	$ 46,659
Unproved and properties under development		1,333	1,279
Total oil and gas		48,845	47,938
Less accumulated DD&A		(30,812)	(30,113)
Oil and gas property and equipment, net		18,033	17,825
Other property and equipment		2,353	2,289
Less accumulated DD&A		(802)	(786)
Other property and equipment, net	[1]	1,551	1,503
Total property and equipment, net		$ 19,584	$ 19,328

[1] $154 million and $136 million related to CDM in 2024 and 2023, respectively.