Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating revenues	$ 3,726	$ 4,613
Operating expenses - net	3,071	2,905
Net income (loss) attributable to NEE	1,666	421
Net Income	$ 1,498	308
Deemed capital structure of NextEra Energy Resources	70.00%
Total assets	$ 132,441		$ 127,684
Operating Segments [Member] | Gulf Power Segment
Segment Reporting Information [Line Items]
Operating revenues	347	328
Operating expenses - net	276	270
Net Income	57	40
Total assets	6,732		6,725
Operating Segments [Member] | FPL Segment
Segment Reporting Information [Line Items]
Operating revenues	2,623	2,540
Operating expenses - net	1,580	1,625
Net income (loss) attributable to NEE		642
Net Income	720
Total assets	62,708		61,610
Operating Segments [Member] | NEER Segment
Segment Reporting Information [Line Items]
Operating revenues	781	1,773
Operating expenses - net	1,172	980
Net income (loss) attributable to NEE	491	318
Total assets	59,318		55,633
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	(25)	(28)
Operating expenses - net	43	30
Net income (loss) attributable to NEE	398	(579)
Total assets	3,683		3,716
Corporate and Other [Member] | FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues	0	0
Operating expenses - net	0	(1)
Net Income	0	$ 0
Total assets	$ 2,657		$ 2,666