Dispositions (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) MWh	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 01, 2023 USD ($) MWh project	Dec. 31, 2022 USD ($)	Oct. 01, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unbilled contracts receivable		$ 4	$ 4	$ 4		$ 80
Electric Energy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional amount | MWh		36,356,085
Clean Energy Businesses | Renewables Americas, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimate of possible loss				24
Unbilled contracts receivable		$ 4	4
Clean Energy Businesses | Renewables Americas, LLC | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimate of possible loss		$ 172
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration the project is sold	$ 54				$ 3,993		$ 6,800
Disposal of noncontrolling interest			62	865
Gain (loss) on disposition of stock in subsidiary, after tax			46	767
Downward price adjustment	33		33
Downward price adjustment, after tax	25		25
Disposal group, including discontinue operation, transaction costs				12
Disposal group, including discontinue operation, transaction costs, after tax				9
Depreciation and amortization, before tax				41
Depreciation and amortization, after tax				$ 28
Disposal group, including discontinued operation, operating income (loss)			25
Disposal group, including discontinued operation, operating income (loss), excluding non-controlling interest			21
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses | Broken Bow II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration the project is sold	$ 54
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Crane Project
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Holding period (in years)		5 years
Carrying value of tax equity interest		$ 5	$ 4
Clean Energy Businesses | Electric Energy | Broken Bow II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of deferred projects | project					1
Notional amount | MWh					75