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Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 6,400	$ 6,000	$ 12,300	$ 11,400
Florida Power & Light Company
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,700	$ 4,400	8,700	$ 8,200
Unbilled revenues	831		831		$ 573
Revenue, remaining performance obligation	575		575
NEER Segment
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 700		$ 700
Revenue Benchmark [Member] \| Florida Power & Light Company \| Customer Concentration Risk \| Retail Customers
Disaggregation of Revenue [Line Items]
Concentration risk, percentage			90.00%