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Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 7,400	$ 6,700	$ 19,700	$ 18,200
Florida Power & Light Company
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5,300	$ 4,900	14,000	$ 13,200
Unbilled revenues	762		762		$ 573
Revenue, remaining performance obligation	565		565
NEER Segment
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 670		$ 670
Revenue Benchmark [Member] \| Florida Power & Light Company \| Customer Concentration Risk \| Retail Customers
Disaggregation of Revenue [Line Items]
Concentration risk, percentage			90.00%