Variable Interest Entities (Narrative) (Details) $ in Millions	1 Months Ended		9 Months Ended
	Oct. 26, 2023 USD ($)	Aug. 31, 2023 USD ($) MW	Sep. 30, 2023 USD ($) MW	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Investments			$ 74	$ 71
Newport Solar Holdings
Variable Interest Entity [Line Items]
Nameplate capacity (in MW) | MW		180
Tax equity investor contribution		$ 17
Newport Solar Holdings | Subsequent Event
Variable Interest Entity [Line Items]
Tax equity investor contribution	$ 69
NWO Holdco, L.L.C
Variable Interest Entity [Line Items]
Nameplate capacity (in MW) | MW			100
Variable Interest Entity, Primary Beneficiary | Aviator Wind
Variable Interest Entity [Line Items]
Nameplate capacity (in MW) | MW			525
Ownership interest			51.00%
Variable Interest Entity, Primary Beneficiary | Aviator Wind Class B Membership
Variable Interest Entity [Line Items]
Noncontrolling ownership interest			49.00%
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments			$ 74	$ 71
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%