Summarized Financial Information of Capital Holdings (Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidating Statements of Income
Operating revenues	$ 4,954	$ 4,654	$ 13,417	$ 12,357
Operating expenses	(3,473)	(3,491)	(9,660)	(9,504)
Interest expense	(311)	(316)	(912)	(940)
Equity in earnings of subsidiaries	0	0	0	0
Other income - net	132	96	388	395
INCOME BEFORE INCOME TAXES	1,302	943	3,233	2,308
Income tax expense (benefit)	421	279	981	723
Net Income (Loss)	881	664	2,252	1,585
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2)	(4)	(7)	(4)
Net Income (Loss) Attributable to Parent	879	660	2,245	1,581
Comprehensive income (loss) attributable to NEE	714	648	2,117	1,572
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0	0	0	0
Operating expenses	(3)	(4)	(12)	(13)
Interest expense	(1)	(2)	(3)	(5)
Equity in earnings of subsidiaries	865	660	2,226	1,602
Other income - net	0	1	0	2
INCOME BEFORE INCOME TAXES	861	655	2,211	1,586
Income tax expense (benefit)	(18)	(5)	(34)	5
Net Income (Loss)	879	660	2,245	1,581
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	0	0
Net Income (Loss) Attributable to Parent	879	660	2,245	1,581
Comprehensive income (loss) attributable to NEE	714	648		1,572
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Income
Operating revenues	1,683	1,343	4,616	3,628
Operating expenses	(1,045)	(1,010)	(3,124)	(3,011)
Interest expense	(200)	(204)	(573)	(614)
Equity in earnings of subsidiaries	0	0	0	0
Other income - net	114	91	343	369
INCOME BEFORE INCOME TAXES	552	220	1,262	372
Income tax expense (benefit)	167	17	293	(3)
Net Income (Loss)	385	203	969	375
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2)	(4)	(7)	(4)
Net Income (Loss) Attributable to Parent	383	199	962	371
Comprehensive income (loss) attributable to NEE	218	187	850	357
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	3,271	3,311	8,801	8,729
Operating expenses	(2,425)	(2,477)	(6,524)	(6,480)
Interest expense	(110)	(110)	(336)	(321)
Equity in earnings of subsidiaries	(865)	(660)	(2,226)	(1,602)
Other income - net	18	4	45	24
INCOME BEFORE INCOME TAXES	(111)	68	(240)	350
Income tax expense (benefit)	272	267	722	721
Net Income (Loss)	(383)	(199)	(962)	(371)
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	0	0
Net Income (Loss) Attributable to Parent	(383)	(199)	(962)	(371)
Comprehensive income (loss) attributable to NEE	$ (218)	$ (187)	$ (850)	$ (357)