Business, Significant Accounting Policies, Significant Events, and Recent Developments - Schedule of Insurance Recoveries (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Line of Credit Facility [Line Items]
Write-off of net book value of facility to depreciation and amortization	$ 0	$ 400
Interest costs incurred	6	20
Total incident expense	31	522
Insurance Settlements Receivable
Property damage insurance receivable as of the beginning of the period	439	0
Recovery of incident expense recorded to insurance receivable	6	445
Insurance recovery gain recorded in other non-operating income, net	80	80
Insurance proceeds received	(201)	(201)
Property damage insurance receivable as of the end of the period	324	324
Total incident expense, net of property damage insurance recoveries	25	77
Other current liabilities	694	694		$ 645
ASAOC
Line of Credit Facility [Line Items]
Interest costs incurred	25	102
Insurance Settlements Receivable
Total cost		110
Moss Landing Incident
Line of Credit Facility [Line Items]
Write-off of net book value of facility to depreciation and amortization	0	400
Interest costs incurred	0	0
Total incident expense	25	502
Insurance Settlements Receivable
Property damage insurance receivable as of the beginning of the period	425	0
Recovery of incident expense recorded to insurance receivable	0	425
Insurance recovery gain recorded in other non-operating income, net	0	0
Insurance proceeds received	(121)	(121)
Property damage insurance receivable as of the end of the period	304	304
Total incident expense, net of property damage insurance recoveries	25	77
Other current liabilities			$ 8
Moss Landing Incident | ASAOC
Line of Credit Facility [Line Items]
Interest costs incurred	25	102
Insurance Settlements Receivable
Total cost		110
Other current liabilities	74	74
Martin Lake Incident
Line of Credit Facility [Line Items]
Write-off of net book value of facility to depreciation and amortization	0	0
Interest costs incurred	6	20
Total incident expense	6	20
Insurance Settlements Receivable
Property damage insurance receivable as of the beginning of the period	14	0
Recovery of incident expense recorded to insurance receivable	6	20
Insurance recovery gain recorded in other non-operating income, net	80	80
Insurance proceeds received	(80)	(80)
Property damage insurance receivable as of the end of the period	20	20
Total incident expense, net of property damage insurance recoveries	0	0
Martin Lake Incident | ASAOC
Line of Credit Facility [Line Items]
Interest costs incurred	$ 0	$ 0