Natural Gas and Oil Reserves Information (Unaudited) - Summary of Changes in Net Quantities of Natural Gas and Crude Oil Reserves (Detail)	12 Months Ended
	Dec. 31, 2023 MMBbls MMcf	Dec. 31, 2022 MMcf MMBbls	Dec. 31, 2021 MMBbls MMcf	Dec. 31, 2020 MMcf MMBbls
Oil (MBbls)
Proved Reserves:
Beginning of period | MMBbls	549	627	11,000
Revisions of previous estimates | MMBbls	(47)	(61)	145
Extensions and discoveries | MMBbls	116	137	0
Acquisitions of minerals in place | MMBbls	0	6	0
Sales of minerals in place | MMBbls	0	(78)	(9,308)
Production | MMBbls	(70)	(82)	(1,210)
End of period | MMBbls	548	549	627
Proved Developed Reserves:
Proved developed reserves | MMBbls	548	480	627	11,000
Proved Undeveloped Reserves:
Proved undeveloped reserves | MMBbls	0	69	0	0
Natural Gas (MMcf)
Proved Reserves:
Beginning of period | MMcf	6,697,570	6,118,083	5,562,876
Revisions of previous estimates | MMcf	(1,803,628)	(6,870)	88,546
Extensions and discoveries | MMcf	570,751	1,090,420	797,198
Acquisitions of minerals in place | MMcf	0	260	202,588
Sales of minerals in place | MMcf	0	(3,707)	(43,851)
Production | MMcf	(524,467)	(500,616)	(489,274)
End of period | MMcf	4,940,226	6,697,570	6,118,083
Proved Developed Reserves:
Proved developed reserves | MMcf	2,734,175	2,531,462	2,245,660	1,967,288
Proved Undeveloped Reserves:
Proved undeveloped reserves | MMcf	2,206,051	4,166,108	3,872,423	3,595,588