Summarized Financial Information of Capital Holdings (Statement of Operations) (Details) - Segments [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidating Statements of Income
Operating revenues	$ 4,358	$ 4,029	$ 8,463	$ 7,703
Operating expenses	(3,212)	(3,078)	(6,187)	(6,013)
Interest expense	(280)	(305)	(601)	(624)
Equity in earnings of subsidiaries	0	0	0	0
Other income - net	128	138	256	299
INCOME BEFORE INCOME TAXES	994	784	1,931	1,365
Income tax expense (benefit)	274	292	560	444
Net Income (Loss)	720	492	1,371	921
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(4)	0	(5)	0
Net Income (Loss) Attributable to Parent	716	492	1,366	921
Comprehensive income (loss) attributable to NEE	785	530	1,402	924
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0	0	0	0
Operating expenses	(5)	(4)	(9)	(8)
Interest expense	(1)	(2)	(2)	(3)
Equity in earnings of subsidiaries	716	507	1,361	942
Other income - net	0	1	1	0
INCOME BEFORE INCOME TAXES	710	502	1,351	931
Income tax expense (benefit)	(6)	10	(15)	10
Net Income (Loss)	716	492	1,366	921
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	0	0
Net Income (Loss) Attributable to Parent	716	492	1,366	921
Comprehensive income (loss) attributable to NEE	785	530	1,402	924
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Income
Operating revenues	1,366	1,143	2,932	2,286
Operating expenses	(984)	(969)	(2,078)	(2,001)
Interest expense	(167)	(194)	(372)	(410)
Equity in earnings of subsidiaries	0	0	0	0
Other income - net	111	130	227	278
INCOME BEFORE INCOME TAXES	326	110	709	153
Income tax expense (benefit)	33	26	125	(19)
Net Income (Loss)	293	84	584	172
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(4)	0	(5)	0
Net Income (Loss) Attributable to Parent	289	84	579	172
Comprehensive income (loss) attributable to NEE	358	122	631	170
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	2,992	2,886	5,531	5,417
Operating expenses	(2,223)	(2,105)	(4,100)	(4,004)
Interest expense	(112)	(109)	(227)	(211)
Equity in earnings of subsidiaries	(716)	(507)	(1,361)	(942)
Other income - net	17	7	28	21
INCOME BEFORE INCOME TAXES	(42)	172	(129)	281
Income tax expense (benefit)	247	256	450	453
Net Income (Loss)	(289)	(84)	(579)	(172)
LESS NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	0	0
Net Income (Loss) Attributable to Parent	(289)	(84)	(579)	(172)
Comprehensive income (loss) attributable to NEE	$ (358)	$ (122)	$ (631)	$ (170)