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Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 6,700	$ 7,200	$ 18,200	$ 19,200
Florida Power & Light Company
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,900	$ 5,500	13,200	$ 14,100
Unbilled revenues	764		764		$ 633
Revenue, remaining performance obligation	360		360
NEER Segment
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 1,200		$ 1,200
Revenue Benchmark [Member] \| Florida Power & Light Company \| Customer Concentration Risk \| Retail Customers
Disaggregation of Revenue [Line Items]
Concentration risk, percentage			90.00%