Segment Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating revenue		$ 20,956	$ 17,069	$ 17,997
Operating expenses - net		17,397	14,233	13,234
Gains (losses) on disposal of businesses/assets – net		522	77	353
Interest expense		585	1,270	1,950
Depreciation and amortization		4,503	3,924	4,052
Equity in earnings (losses) of equity method investees		203	666	(1,351)
Income Tax Expense (Benefit)		586	348	44
Net income (loss)		3,246	2,827	2,369
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS		901	746	550
Net income (loss) attributable to NEE		4,147	3,573	2,919
Capital expenditures, independent power and other investments and nuclear fuel purchases		19,283	16,077	14,610
Property, plant and equipment – net		111,059	99,348	91,803
Total assets		158,935	140,912	127,684
Investment in equity method investees		6,582	6,159	5,728
Retained Earnings [Member]
Segment Reporting Information [Line Items]
Net income (loss)		4,147	3,573	2,919
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenue		17,282	14,102	13,060
Operating expenses - net		11,988	9,586	8,940
Interest expense		768	615	641
Depreciation and amortization		2,695	2,266	2,526
Income Tax Expense (Benefit)		947	838	678
Net income (loss)		3,701	3,206	2,890	[1]
Electric utility plant and other property – net		64,693	58,227
Total assets		86,559	78,067
FPL [Member] | Retained Earnings [Member]
Segment Reporting Information [Line Items]
Net income (loss)	[1]	3,701	3,206
Net income (loss) attributable to NEE		$ 3,701	$ 3,206	$ 2,890
NEER [Member]
Segment Reporting Information [Line Items]
Deemed Capital Structure		70.00%	70.00%	70.00%
Operating Segments [Member] | FPL [Member]
Segment Reporting Information [Line Items]
Operating revenue		$ 17,282	$ 14,102	$ 13,060
Operating expenses - net		11,992	9,587	8,940
Gains (losses) on disposal of businesses/assets – net		4	1	0
Interest expense		768	615	641
Depreciation and amortization		2,695	2,266	2,526
Equity in earnings (losses) of equity method investees		0	0	0
Income Tax Expense (Benefit)		947	838	678
Net income (loss)		3,701	3,206	2,890
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS		0	0	0
Net income (loss) attributable to NEE		3,701	3,206	2,890
Capital expenditures, independent power and other investments and nuclear fuel purchases		9,185	7,570	7,679
Electric utility plant and other property – net		64,693	58,227	53,879
Total assets		86,559	78,067	71,001
Investment in equity method investees		0	0	0
Operating Segments [Member] | NEER Segment
Segment Reporting Information [Line Items]
Operating revenue		3,720	3,053	5,046
Operating expenses - net		5,140	4,434	4,125
Gains (losses) on disposal of businesses/assets – net		536	78	363
Interest expense		128	367	659
Depreciation and amortization		1,722	1,576	1,460
Equity in earnings (losses) of equity method investees		202	666	(1,351)
Income Tax Expense (Benefit)		(391)	(395)	(416)
Net income (loss)		(616)	(147)	(19)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS		901	746	550
Net income (loss) attributable to NEE		285	599	531
Capital expenditures, independent power and other investments and nuclear fuel purchases		9,645	8,363	6,893
Property, plant and equipment – net		45,840	40,900	37,842
Total assets		70,713	62,113	55,633
Investment in equity method investees		6,572	6,150	5,713
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating revenue		(46)	(86)	(109)
Operating expenses - net		265	212	169
Gains (losses) on disposal of businesses/assets – net		(18)	(2)	(10)
Interest expense		(311)	288	650
Depreciation and amortization		86	82	66
Equity in earnings (losses) of equity method investees		1	0	0
Income Tax Expense (Benefit)		30	(95)	(218)
Net income (loss)		161	(232)	(502)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS		0	0	0
Net income (loss) attributable to NEE		161	(232)	(502)
Capital expenditures, independent power and other investments and nuclear fuel purchases		453	144	38
Property, plant and equipment – net		526	221	82
Total assets		1,663	732	1,050
Investment in equity method investees		$ 10	$ 9	$ 15

[1] FPL's comprehensive income is the same as reported net income.