Segment Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources		70.00%		70.00%
OPERATING REVENUES		$ 4,808	$ 4,805	$ 13,185	$ 12,457
Operating expenses (income) - net		3,409	3,526	8,095	8,775
Net income (loss) attributable to NEE		847	753	3,223	1,946
Total assets		96,781		96,781		$ 89,993
FPL [Member]
Segment Reporting Information [Line Items]
OPERATING REVENUES		3,477	3,283	9,095	8,337
Operating expenses (income) - net		2,455	2,362	6,322	5,874
Net income (loss) attributable to NEE	[1]	566	515	1,537	1,356
Total assets		49,915		49,915		45,501
Operating Segments [Member] | FPL [Member]
Segment Reporting Information [Line Items]
OPERATING REVENUES		3,477	3,283	9,095	8,337
Operating expenses (income) - net		2,455	2,362	6,322	5,874
Net income (loss) attributable to NEE		566	515	1,537	1,356
Total assets		49,915		49,915		45,501
Operating Segments [Member] | NextEra Energy Resources [Member]
Segment Reporting Information [Line Items]
Operating revenues		1,333	1,430	4,052	3,841
Operating expenses (income) - net		964	974	2,852	2,575
Net income (loss) attributable to NEE		292	307	1,069	765
Total assets		44,991		44,991		41,743
Corporate, Non-Segment [Member] | Corporate and Other [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		(2)	92	38	279
Operating expenses (income) - net		(10)	190	(1,079)	326
Net income (loss) attributable to NEE		(11)	$ (69)	617	$ (175)
Total assets		$ 1,875		$ 1,875		$ 2,749

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