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Summary of Significant Accounting and Reporting Policies - Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Summary of Significant Accounting Policies [Line Items]    
Revenue Equivalent Of Difference In Accumulated Deferred Income Taxes Computer Under Accounting Rules Versus Regulatory Rules $ 3,195 $ 3,504
Proceeds From Sale Of Renewable Energy Tax Credits $ 370  
Amortization period 5 years  
Unrecognized tax benefits that impact annual effective income tax rate $ 96  
FPL [Member]    
Summary of Significant Accounting Policies [Line Items]    
Revenue Equivalent Of Difference In Accumulated Deferred Income Taxes Computer Under Accounting Rules Versus Regulatory Rules 3,145 3,449
Accumulated Deferred Investment Tax Credit $ 997 $ 1,031