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Stock-Based Compensation - Supplemental Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-Based Compensation
Minimum tax withholdings	$ 22	$ 6	$ 9
Compensation Expense	123	34	27
Tax detriment recognized	2	3	2
Unrecognized Total Cost	147
RSUs
Stock-Based Compensation
Compensation Expense	20	15	9
Unrecognized Total Cost	$ 29
Weighted Average Recognition Period Remaining (In years)	1 year 7 months 9 days
Award vesting period	3 years
RSUs | Vivint LTIP
Stock-Based Compensation
Compensation Expense	$ 76	0	0
Unrecognized Total Cost	$ 69
Weighted Average Recognition Period Remaining (In years)	1 year 9 months 25 days
Award vesting period	4 years
PSUs | Vivint LTIP
Stock-Based Compensation
Compensation Expense	$ 2	0	0
Unrecognized Total Cost	$ 3
Weighted Average Recognition Period Remaining (In years)	2 years 3 months
DSUs
Stock-Based Compensation
Compensation Expense	$ 2	2	2
Unrecognized Total Cost	$ 0
Weighted Average Recognition Period Remaining (In years)	0 years
RPSUs
Stock-Based Compensation
Compensation Expense	$ 3	11	9
Unrecognized Total Cost	$ 17
Weighted Average Recognition Period Remaining (In years)	1 year 8 months 8 days
Award vesting period	3 years
PRSUs
Stock-Based Compensation
Compensation Expense	$ 8	0	0
Unrecognized Total Cost	$ 14
Weighted Average Recognition Period Remaining (In years)	2 years 3 months 14 days
Award vesting period	3 years
PRSUs | NRG LTIP
Stock-Based Compensation
Compensation Expense	$ 12	$ 6	$ 7
Unrecognized Total Cost	$ 15
Weighted Average Recognition Period Remaining (In years)	1 year 8 months 26 days

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