Revenue - Schedule of Future Performance Obligations (Details)	1 Months Ended
	Jul. 31, 2026 USD ($) MW	Jun. 30, 2026 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 3,993,000,000
Subsequent Event
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Megawatts cleared \| MW	10,180
Clearing price (dollars per MW-day)	$ 325.00
Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		2,807,000,000
2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		1,186,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		639,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 639,000,000
Remaining performance obligation period		6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 0
Remaining performance obligation period		6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 1,273,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 1,273,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 0
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 1,257,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 561,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 696,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 541,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 50,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 491,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 56,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 56,000,000
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 0
Remaining performance obligation period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2031-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 226,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2031-01-01 \| Expected capacity revenues as of June 30, 2026
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 226,000,000
Remaining performance obligation period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2031-01-01 \| 2028/2029 PJM Capacity Year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total expected capacity revenues		$ 0
Remaining performance obligation period