Segment Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources		70.00%		70.00%
OPERATING REVENUES		$ 4,404	$ 3,817	$ 8,377	$ 7,651
Operating expenses (income) - net		3,119	2,648	4,687	5,248
Net income (loss) attributable to NEE		793	540	2,376	1,193
Total assets		92,890		92,890		$ 89,993
FPL [Member]
Segment Reporting Information [Line Items]
OPERATING REVENUES		3,091	2,750	5,618	5,054
Operating expenses (income) - net		2,150	1,922	3,866	3,512
Net income (loss) attributable to NEE	[1]	526	448	971	841
Total assets		47,800		47,800		45,501
Operating Segments [Member] | FPL [Member]
Segment Reporting Information [Line Items]
OPERATING REVENUES		3,091	2,750	5,618	5,054
Operating expenses (income) - net		2,150	1,922	3,866	3,512
Net income (loss) attributable to NEE		526	448	971	841
Total assets		47,800		47,800		45,501
Operating Segments [Member] | NextEra Energy Resources [Member]
Segment Reporting Information [Line Items]
Operating revenues		1,295	970	2,719	2,411
Operating expenses (income) - net		957	654	1,888	1,600
Net income (loss) attributable to NEE		301	234	777	458
Total assets		43,944		43,944		41,743
Corporate, Non-Segment [Member] | Corporate and Other [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		18	97	40	186
Operating expenses (income) - net		12	72	(1,067)	136
Net income (loss) attributable to NEE		(34)	$ (142)	628	$ (106)
Total assets		$ 1,146		$ 1,146		$ 2,749

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