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Revenue Recognition (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Revenue from contracts with customers $ 5,700 $ 5,000  
Florida Power & Light Company      
Disaggregation of Revenue [Line Items]      
Revenue from contracts with customers 3,900 $ 3,700  
Unbilled revenues 681   $ 661
Revenue, remaining performance obligation 380    
NEER Segment      
Disaggregation of Revenue [Line Items]      
Revenue, remaining performance obligation $ 1,200    
Revenue Benchmark [Member] | Florida Power & Light Company | Customer Concentration Risk | Retail Customers      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 90.00%