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Summary of Significant Accounting and Reporting Policies (Regulatory Assets and Liabilities) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Current:    
Early retirement of generation facilities and transmission assets $ 145 $ 140
Acquisition of purchased power agreements 141 141
Deferred clause and franchise expenses 919 698
Storm restoration costs 911 92
Other 49 54
Total 2,165 1,125
Noncurrent:    
Early retirement of generation facilities and transmission assets 2,026 2,233
Acquisition of purchased power agreements 191 332
Deferred clause expenses 1,227 17
Storm restoration costs 326 150
Accrued asset removal costs 532 263
Other 1,690 1,583
Total 5,992 4,578
Current:    
Deferred clause revenues 339 274
Other 11 15
Total 350 289
Noncurrent:    
Asset retirement obligation regulatory expense difference 3,323 4,290
Accrued asset removal costs 658 782
Deferred taxes 4,233 4,561
Other 1,412 1,640
Total 9,626 11,273
FPL [Member]    
Current:    
Early retirement of generation facilities and transmission assets 145 140
Acquisition of purchased power agreements 141 141
Deferred clause and franchise expenses 919 698
Storm restoration costs 911 92
Other 39 40
Total 2,155 1,111
Noncurrent:    
Early retirement of generation facilities and transmission assets 2,026 2,233
Acquisition of purchased power agreements 191 332
Deferred clause expenses 1,227 17
Storm restoration costs 326 150
Accrued asset removal costs 532 263
Other 1,182 1,348
Total 5,484 4,343
Current:    
Deferred clause revenues 339 274
Other 10 4
Total 349 278
Noncurrent:    
Asset retirement obligation regulatory expense difference 3,323 4,290
Accrued asset removal costs 623 752
Deferred taxes 4,129 4,457
Other 1,383 1,554
Total $ 9,458 $ 11,053
Generation Facilities And Transmission Assets    
Noncurrent:    
Regulatory asset, amortization period 20 years 20 years
Purchased Power Agreements    
Noncurrent:    
Regulatory asset, amortization period 9 years 9 years
Deferred Clause And Franchise Expenses    
Noncurrent:    
Regulatory asset, amortization period 21 months  
Storm Restoration Costs    
Noncurrent:    
Regulatory asset, amortization period 12 months