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Non-Derivative Fair Value Measurements - Nonrecurring Fair Value Measurements (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment, impairment	$ 700.0
Impairment charge, net of tax	500.0
Trading price (per share)				$ 9.50
Investment in equity method investees	$ 5,401.0	$ 6,118.0
NextEra Energy Resources
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investments, fair value			$ 1,000.0
Investment in equity method investees			$ 1,700.0

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Fair Value Measurement, Trading Price, Per Share

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Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting.

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Fair value portion of investments accounted under the equity method.

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