Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other Than Fair Value and Special Use Funds) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	$ 7,861	$ 7,495
Special Use Funds Storm Fund Assets	1	1
Available for sale debt securities amortized cost	$ 3,369	2,858
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	9 years
Other investments weighted average maturity	5 years
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	$ 1,023	998
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	236	221
Long Term Debt Including Current Maturities Fair Value And Carrying Value	65,930	61,889
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	1,024	999
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	236	221
Long Term Debt Including Current Maturities Fair Value And Carrying Value	62,621	57,892
Florida Power & Light Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	5,471	5,220
Special Use Funds Storm Fund Assets	1	1
Available for sale debt securities amortized cost	$ 1,877	1,873
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	9 years
Florida Power & Light Company | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	$ 752	744
Long Term Debt Including Current Maturities Fair Value And Carrying Value	23,457	21,002
Florida Power & Light Company | Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	752	744
Long Term Debt Including Current Maturities Fair Value And Carrying Value	$ 22,307	$ 19,364