Summarized Financial Information of Capital Holdings (Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 1,545	$ 1,181
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(3,879)	(1,566)
Capital contributions from NEE	0	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	292	0
Other - net	(94)	2
Net cash used in investing activities	(3,681)	(1,564)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	1,250	194
Retirements of long-term debt	(367)	(170)
Proceeds from notes payable	500	625
Net change in commercial paper	1,186	(22)
Issuances of common stock	17	16
Dividends on common stock	(401)	(341)
Contributions from (dividends to) NEE	0	0
Other - net (NEE consolidated)	8	(27)
Other - net	8	(27)
Net cash provided by (used in) financing activities	2,193	275
Net increase (decrease) in cash and cash equivalents	57	(108)
Cash and cash equivalents at beginning of period	571	577
Cash and cash equivalents at end of period	628	469
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	728	907
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	0	0
Capital contributions from NEE	(321)	(551)
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	0	0
Net cash used in investing activities	(321)	(551)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	0	0
Proceeds from notes payable	0	0
Net change in commercial paper	0	0
Issuances of common stock	17	16
Dividends on common stock	(401)	(341)
Contributions from (dividends to) NEE	0	0
Other - net	(21)	(31)
Net cash provided by (used in) financing activities	(405)	(356)
Net increase (decrease) in cash and cash equivalents	2	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	2	0
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	613	225
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(2,683)	(801)
Capital contributions from NEE	0	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	292	0
Other - net	(98)	2
Net cash used in investing activities	(2,489)	(799)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	1,250	194
Retirements of long-term debt	(333)	(139)
Proceeds from notes payable	0	625
Net change in commercial paper	692	700
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	312	(902)
Other - net	2	(25)
Net cash provided by (used in) financing activities	1,923	453
Net increase (decrease) in cash and cash equivalents	47	(121)
Cash and cash equivalents at beginning of period	546	562
Cash and cash equivalents at end of period	593	441
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	204	49
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(1,196)	(765)
Capital contributions from NEE	321	551
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	4	0
Net cash used in investing activities	(871)	(214)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	(34)	(31)
Proceeds from notes payable	500	0
Net change in commercial paper	494	(722)
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	(312)	902
Other - net	27	29
Net cash provided by (used in) financing activities	675	178
Net increase (decrease) in cash and cash equivalents	8	13
Cash and cash equivalents at beginning of period	25	15
Cash and cash equivalents at end of period	$ 33	$ 28