v3.25.4

Variable Interest Entities (Narrative) (Details) $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) MW	Dec. 31, 2025 USD ($) MW	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Deemed contribution from sale of membership interest		$ 35	$ 0	$ 0
Investments		61	64
Class A - Tax Equity Membership
Variable Interest Entity [Line Items]
Proceeds from the sale of membership interests in VIEs		$ 15	0	$ 86
NWO Wind Equity Holdings
Variable Interest Entity [Line Items]
Proceeds from the sale of membership interests in VIEs	$ 36
Delta Township, Michigan, Solar Project
Variable Interest Entity [Line Items]
Proceeds from the sale of membership interests in VIEs	$ 8
Variable Interest Entity, Primary Beneficiary | NWO Holdco
Variable Interest Entity [Line Items]
Nameplate capacity (in MW) | MW		100
Variable Interest Entity, Primary Beneficiary | BG Solar Holdings
Variable Interest Entity [Line Items]
Nameplate capacity (in MW) | MW		200
Renewablee Energy Purchase AGreement Term		15 years
Variable Interest Entity, Primary Beneficiary | NWO Wind Equity Holdings
Variable Interest Entity [Line Items]
Ownership interest	50.00%
Variable Interest Entity, Primary Beneficiary | Delta Township, Michigan, Solar Project
Variable Interest Entity [Line Items]
Ownership interest	50.00%
Nameplate capacity (in MW) | MW	24
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments		$ 54	$ 64
Variable Interest Entity, Not Primary Beneficiary | T.E.S. Filer City
Variable Interest Entity [Line Items]
Ownership interest		50.00%
Variable Interest Entity, Not Primary Beneficiary | Grayling
Variable Interest Entity [Line Items]
Ownership interest		50.00%
Variable Interest Entity, Not Primary Beneficiary | Genesee
Variable Interest Entity [Line Items]
Ownership interest		50.00%
Variable Interest Entity, Not Primary Beneficiary | Craven
Variable Interest Entity [Line Items]
Ownership interest		50.00%

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