Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Total
Disaggregation of Revenue [Line Items]
Revenue	$ 1,850	$ 407	$ 6,171	$ 1,374
Total | Haynesville
Disaggregation of Revenue [Line Items]
Revenue	826	194	2,492	652
Total | Northeast Appalachia
Disaggregation of Revenue [Line Items]
Revenue	538	213	2,081	722
Total | Southwest Appalachia
Disaggregation of Revenue [Line Items]
Revenue	486		1,598
Natural Gas
Disaggregation of Revenue [Line Items]
Revenue	1,597	407	5,371	1,374
Natural Gas | Haynesville
Disaggregation of Revenue [Line Items]
Revenue	826	194	2,492	652
Natural Gas | Northeast Appalachia
Disaggregation of Revenue [Line Items]
Revenue	538	213	2,081	722
Natural Gas | Southwest Appalachia
Disaggregation of Revenue [Line Items]
Revenue	233		798
Oil
Disaggregation of Revenue [Line Items]
Revenue	86	0	250	0
Oil | Haynesville
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Oil | Northeast Appalachia
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Oil | Southwest Appalachia
Disaggregation of Revenue [Line Items]
Revenue	86		250
NGL
Disaggregation of Revenue [Line Items]
Revenue	167	0	550	0
NGL | Haynesville
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
NGL | Northeast Appalachia
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
NGL | Southwest Appalachia
Disaggregation of Revenue [Line Items]
Revenue	167		550
Marketing
Disaggregation of Revenue [Line Items]
Revenue	666	193	2,364	641
Natural Gas
Disaggregation of Revenue [Line Items]
Revenue	599	193	2,155	526
Oil
Disaggregation of Revenue [Line Items]
Revenue	34	0	101	82
NGL
Disaggregation of Revenue [Line Items]
Revenue	$ 33	$ 0	$ 108	$ 33