Summary of Significant Accounting and Reporting Policies - Property, Plant and Equiptment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Electric plant in service and other property	$ 118,443		$ 118,443		$ 112,500
Nuclear fuel	1,562		1,562		1,606
Construction work in progress	15,505		15,505		14,141
Property, plant and equipment, gross	135,510		135,510		128,247
Accumulated depreciation and amortization	(30,117)		(30,117)		(28,899)
Property, plant and equipment – net	105,393		105,393		99,348
Allowance for Funds Used During Construction, Equity	30	$ 34	67	$ 63
Florida Power & Light Company
Property, Plant and Equipment [Line Items]
Electric plant in service and other property	71,298		71,298		67,771
Nuclear fuel	1,147		1,147		1,170
Construction work in progress	5,799		5,799		6,326
Property, plant and equipment, gross	78,244		78,244		75,267
Accumulated depreciation and amortization	(17,458)		(17,458)		(17,040)
Electric utility plant and other property – net	60,786		60,786		$ 58,227
Allowance for Funds Used During Construction	36	42	81	78
Allowance for Funds Used During Construction, Equity	28	31	62	58
NextEra Energy Resources
Property, Plant and Equipment [Line Items]
Project Development Costs	$ 37	$ 33	$ 73	$ 63