Debt - Senior Notes (Details) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 28, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Jul. 31, 2023	Feb. 28, 2023	May 06, 2021
Debt Instrument [Line Items]
Proceeds from the issuance of Senior Notes, after premium, discount and underwriting fees		$ 984,625,000	$ 199,250,000	$ 490,625,000
Senior Notes
Debt Instrument [Line Items]
Face amount of debt instrument		977,400,000
9.250% Senior Notes Due 2028 | Senior Notes
Debt Instrument [Line Items]
Face amount of debt instrument		$ 150,000,000			$ 150,000,000	$ 300,000,000	$ 400,000,000
Stated interest rate (as a percent)		9.25%					9.25%
7.25 Senior Notes Due 2026 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)		7.25%						7.25%
Proceeds from the issuance of Senior Notes, after premium, discount and underwriting fees	$ 200,000,000
7.25 Senior Notes Due 2026 | Senior Notes | Independence Energy Finance LLC
Debt Instrument [Line Items]
Face amount of debt instrument								$ 500,000,000
Stated interest rate (as a percent)	7.25%
7.25 Senior Notes Due 2026 | New Notes | Independence Energy Finance LLC
Debt Instrument [Line Items]
Proportion of face amount (as a percent)	101.00%