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Dispositions (Narrative) (Details) - USD ($) $ in Millions			6 Months Ended					12 Months Ended				35 Months Ended
	Mar. 31, 2026	Aug. 04, 2025	Jun. 30, 2028	Dec. 31, 2027	Jun. 30, 2027	Dec. 31, 2026	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023		Jun. 30, 2028	Oct. 25, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contribution from NCI									$ 47.0	$ 278.0	[1]
Florida Progress LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Termination fee		$ 240.0
Florida Progress LLC | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contribution from NCI			$ 1,000.0	$ 1,500.0	$ 500.0	$ 200.0	$ 2,800.0					$ 6,000.0
Investment (percent)			19.70%				9.20%					19.70%
Noncontrolling Interests
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contribution from NCI									47.0	278.0	[1]
Discontinued Operations, Held-for-sale | Commercial Renewables Disposal Groups
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest balance									18.0
Loss on disposal								$ (4.0)	(14.0)	$ (1,725.0)
Discontinued Operations, Disposed of by Sale | Brookfield Renewable Partners
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received													$ 1,100.0
Discontinued Operations, Disposed of by Sale | Commercial Renewables Disposal Groups
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Closing period													18 months
Discontinued Operations, Disposed of by Sale | Commercial Renewables Disposal Groups | Accounts Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received									$ 551.0
Discontinued Operations, Disposed of by Sale | Piedmont Tennessee Disposal Group | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received	$ 2,480.0
Termination fee as a percentage of the purchase price (percent)	6.50%
[1] Relates to tax equity financing activity in the Commercial Renewables Disposal Groups.

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