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Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 8,100	$ 7,400	$ 20,800	$ 19,700
Florida Power & Light Company
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5,400	$ 5,300	14,600	$ 14,000
Unbilled revenues	805		805		$ 705
Revenue, remaining performance obligation	1,220		1,220
NEER Segment
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation	$ 6,400		$ 6,400
Revenue Benchmark [Member] \| Florida Power & Light Company \| Customer Concentration Risk \| Retail Customers
Disaggregation of Revenue [Line Items]
Concentration risk, percentage			90.00%