Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Statutory federal income tax rate	21.00%	21.00%	21.00%
Increases (reductions) resulting from:
State income taxes – net of federal income tax benefit	1.40%	1.60%	1.60%
Taxes attributable to noncontrolling interests	3.00%	4.90%	5.00%
Amortization of deferred regulatory credit	(2.50%)	(4.80%)	(4.40%)
Other – net	(0.80%)	(0.60%)	(0.90%)
Effective income tax rate (in hundredths)	13.80%	15.30%	11.00%
Effective Income Tax Rate Reconciliation, Production And Investment Tax Credits	(8.30%)	(6.80%)	(11.30%)
FPL [Member]
Operating Loss Carryforwards [Line Items]
Statutory federal income tax rate	21.00%	21.00%	21.00%
Increases (reductions) resulting from:
State income taxes – net of federal income tax benefit	4.30%	4.40%	4.10%
Taxes attributable to noncontrolling interests	0.00%	0.00%	0.00%
Amortization of deferred regulatory credit	(3.20%)	(4.00%)	(3.50%)
Other – net	(0.30%)	0.10%	(0.20%)
Effective income tax rate (in hundredths)	19.80%	20.40%	20.70%
Effective Income Tax Rate Reconciliation, Production And Investment Tax Credits	(2.00%)	(1.10%)	(0.70%)