Summary of Significant Accounting and Reporting Policies - Property, Plant and Equiptment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Electric plant in service and other property	$ 133,184		$ 133,184		$ 124,963
Nuclear fuel	1,497		1,497		1,684
Construction work in progress	18,899		18,899		15,675
Property, plant and equipment, gross	153,580		153,580		142,322
Accumulated depreciation and amortization	(32,697)		(32,697)		(31,263)
Property, plant and equipment – net	120,883		120,883		111,059
Allowance for Funds Used During Construction, Equity	43	$ 20	105	$ 88
Florida Power & Light Company
Property, Plant and Equipment [Line Items]
Electric plant in service and other property	78,282		78,282		74,353
Nuclear fuel	1,069		1,069		1,190
Construction work in progress	7,801		7,801		7,026
Property, plant and equipment, gross	87,152		87,152		82,569
Accumulated depreciation and amortization	(18,298)		(18,298)		(17,876)
Electric utility plant and other property – net	68,854		68,854		$ 64,693
Allowance for Funds Used During Construction	49	25	123	106
Allowance for Funds Used During Construction, Equity	40	19	100	82
NextEra Energy Resources
Property, Plant and Equipment [Line Items]
Project Development Costs	$ 88	$ 46	$ 220	$ 119