Segment Information (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020		Sep. 30, 2021	Sep. 30, 2020		Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating revenues		$ 4,370	$ 4,785		$ 12,023	$ 13,602
Operating expenses – net		4,004	3,766		10,485	9,705
Gains (losses) on disposal of businesses/assets – net		13	(11)		20	279
Net income (loss) attributable to NEE		447	1,229		2,369	2,924
Net Income		$ 304	1,123		$ 1,874	2,559
Deemed capital structure of NextEra Energy Resources		70.00%			70.00%
Total assets		$ 139,163			$ 139,163			$ 127,684
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues		4,134	3,859	[1]	10,673	9,885	[1]
Operating expenses – net		2,868	2,683	[1]	7,063	6,596	[1]
Net Income	[2]	927	848	[1]	2,586	2,334	[1],[3]
Total assets		75,245			75,245			71,001	[4]
Operating Segments [Member] | Gulf Power Segment
Segment Reporting Information [Line Items]
Operating revenues		440	404		1,137	1,065
Operating expenses – net		326	289		876	817
Gains (losses) on disposal of businesses/assets – net		0	0		0	0
Net income (loss) attributable to NEE		91	91
Net Income		91	91		211	185
Total assets		6,978			6,978			6,725
Operating Segments [Member] | FPL Segment
Segment Reporting Information [Line Items]
Operating revenues		3,694	3,455		9,536	8,820
Operating expenses – net		2,541	2,395		6,187	5,780
Gains (losses) on disposal of businesses/assets – net		0	0		0	1
Net income (loss) attributable to NEE	[2]	836	757
Net Income		836	757		2,375	2,148
Total assets		65,618			65,618			61,610
Operating Segments [Member] | NEER Segment
Segment Reporting Information [Line Items]
Operating revenues		258	953		1,420	3,802
Operating expenses – net		1,093	1,021		3,289	2,994
Gains (losses) on disposal of businesses/assets – net		12	(5)		25	288
Net income (loss) attributable to NEE		(428)	376		(252)	1,175
Total assets		63,493			63,493			55,633
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		(22)	(27)		(70)	(85)
Operating expenses – net		44	61		133	114
Gains (losses) on disposal of businesses/assets – net		1	(6)		(5)	(10)
Net income (loss) attributable to NEE		(52)	5		35	(584)
Total assets		3,074			3,074			3,716
Corporate and Other [Member] | FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues		0	0		0	0
Operating expenses – net		1	(1)		0	(1)
Net Income		0	$ 0		0	$ 1
Total assets		$ 2,649			$ 2,649			$ 2,666

[1] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 – Merger of FPL and Gulf Power Company.

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

[3] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 – Merger of FPL and Gulf Power Company.

[4] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 – Merger of FPL and Gulf Power Company.