Supplemental Information on Oil and Gas Operations (Unaudited) (Proved Developed and Undeveloped Reserves) (Details) MMBbls in Thousands, MMcf in Millions		12 Months Ended
		Dec. 31, 2022 MMBoe MMBbls MMcf	Dec. 31, 2021 MMBoe MMcf MMBbls	Dec. 31, 2020 MMBoe MMBbls MMcf	Dec. 31, 2019 MMBoe MMBbls MMcf
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, beginning balance | MMBoe		1,625	752	757
Proved developed and undeveloped reserves, revisions due to prices | MMBoe		34	155	78
Proved developed and undeveloped reserves, revisions other than price | MMBoe		49	43	55
Proved developed and undeveloped reserves, extensions and discoveries | MMBoe		278	228	135
Proved developed and undeveloped reserves, Purchase of reserves | MMBoe		153	663	7
Proved developed and undeveloped reserves, production | MMBoe		(223)	(209)	(122)
Proved developed and undeveloped reserves, sale of reserves | MMBoe		(3)	(7)	(2)
Proved developed and undeveloped reserves, ending balance | MMBoe		1,815	1,625	752
Proved developed reserves | MMBoe		1,419	1,285	574	589
Proved developed producing reserves | MMBoe		1,397	1,260	564	578
Proved undeveloped reserves | MMBoe		396	340	178	168
Conversion rate of gas reserves from barrels of oil to Boe		6
Oil [Member]
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, beginning balance		709	282	276
Proved developed and undeveloped reserves, revisions due to prices		15	55	(26)
Proved developed and undeveloped reserves, revisions other than price		(55)	(23)	18
Proved developed and undeveloped reserves, extensions and discoveries		127	112	71
Proved developed and undeveloped reserves, Purchase of reserves		106	393	1
Proved developed and undeveloped reserves, production		(109)	(106)	(57)
Proved developed and undeveloped reserves, sale of reserves		0	(4)	(1)
Proved developed and undeveloped reserves, ending balance		793	709	282
Proved developed reserves		596	544	194	198
Proved developed producing reserves		585	533	190	191
Proved undeveloped reserves		197	165	88	78
Natural Gas [Member]
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, beginning balance | MMcf	[1]	2,878	1,512	1,621
Proved developed and undeveloped reserves, revisions due to prices | MMcf	[1]	61	382	(209)
Proved developed and undeveloped reserves, revisions other than price | MMcf	[1]	13	11	119
Proved developed and undeveloped reserves, extensions and discoveries | MMcf	[1]	449	348	188
Proved developed and undeveloped reserves, Purchase of reserves | MMcf	[1]	137	961	19
Proved developed and undeveloped reserves, production | MMcf	[1]	(356)	(325)	(221)
Proved developed and undeveloped reserves, sale of reserves | MMcf	[1]	(7)	(11)	(5)
Proved developed and undeveloped reserves, ending balance | MMcf	[1]	3,175	2,878	1,512
Proved developed reserves | MMcf	[1]	2,595	2,361	1,244	1,344
Proved developed producing reserves | MMcf	[1]	2,553	2,316	1,223	1,327
Proved undeveloped reserves | MMcf	[1]	580	517	268	277
Natural Gas Liquids [Member]
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, beginning balance		437	218	211
Proved developed and undeveloped reserves, revisions due to prices		8	36	(17)
Proved developed and undeveloped reserves, revisions other than price		3	64	17
Proved developed and undeveloped reserves, extensions and discoveries		76	58	33
Proved developed and undeveloped reserves, Purchase of reserves		24	110	3
Proved developed and undeveloped reserves, production		(54)	(48)	(28)
Proved developed and undeveloped reserves, sale of reserves		(1)	(1)	(1)
Proved developed and undeveloped reserves, ending balance		493	437	218
Proved developed reserves		391	348	173	167
Proved developed producing reserves		387	341	171	165
Proved undeveloped reserves		102	89	45	44

[1] Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. NGL reserves are converted to Boe on a one-to-one basis with oil. The conversion rates are not necessarily indicative of the relationship of oil, natural gas and NGL prices.