Derivative Instruments - Narrative (Details)	3 Months Ended			12 Months Ended
	Mar. 31, 2024 USD ($) Bcf	Mar. 31, 2024 USD ($) MBbls	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) Bcf	Dec. 31, 2023 USD ($) MBbls
Derivative Instruments, Gain (Loss)
Maximum additional collateral as percentage of derivative liability (in percent)			100.00%
Aggregate fair value of derivative instruments with credit-risk related contingencies	$ 0	$ 0	$ 0	$ 6,400,000	$ 6,400,000
Collateral posted				0	0
OTC Derivative Instrument Contracts
Derivative Instruments, Gain (Loss)
Aggregate fair value of derivative instruments with credit-risk related contingencies	0	0	0	0	0
Exchange traded natural gas contracts
Derivative Instruments, Gain (Loss)
Collateral posted	69,300,000	69,300,000	69,300,000	13,000,000	13,000,000
Henry hub cash bonus
Derivative Instruments, Gain (Loss)
Derivative liability	$ 29,000,000	$ 29,000,000	$ 29,000,000	$ 48,000,000	$ 48,000,000
Cash flow hedging | Commodity derivatives
Derivative Instruments, Gain (Loss)
Volume of derivative instruments (in Bcf, Mbbls)	2,072,000,000,000	3,300,000		2,045	1,049