Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Extractive Industries [Abstract]
Future cash inflows		$ 54,389,915	$ 113,954,835
Future costs:
Production		(29,663,691)	(31,991,109)
Development	[1]	(2,978,183)	(3,313,724)
Future net cash flows before income taxes		21,748,041	78,650,002
Future income tax expense		(4,176,604)	(16,651,625)
Total future net cash flows before 10% discount		17,571,437	61,998,377
10% annual discount		(10,732,951)	(37,453,094)
Standardized measure of discounted future net cash flows		$ 6,838,486	$ 24,545,283	$ 12,485,226	$ 2,846,322

[1] 2023 includes $358.7 million of undiscounted future asset retirement costs as of December 31, 2023, using current estimates of future abandonment costs.