Non-Derivative Fair Value Measurements - Nonrecurring Fair Value Measurements (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment, impairment	$ 1,200,000,000
Impairment charge, net of tax		$ 900,000,000
Trading price (per share)	$ 29.70
Investment in equity method investees			$ 7,259,000,000	$ 6,156,000,000
NextEra Energy Resources
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investments, fair value	$ 3,000,000,000		$ 27.61
Investment in equity method investees	$ 4,200,000,000