Summarized Financial Information of Capital Holdings (Statement of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 4,513	$ 3,968
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(5,676)	(5,058)
Capital contribution to FPL	0	0
Cash grants under the Recovery Act	6	321
Sale of independent power and other investments of NEER	34	307
Proceeds from the sale of a noncontrolling interest in subsidiaries	319	438
Other - net	(160)	(86)
Net cash used in investing activities	(5,477)	(4,078)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	3,462	4,244
Retirements of long-term debt	(3,097)	(3,688)
Issuances of notes payable	1,450	501
Retirements of notes payable	(313)	0
Net change in commercial paper	(116)	(6)
Issuances of common stock	1,274	57
Dividends on common stock	(1,031)	(945)
Contributions from (dividends to) NEE	0	0
Other - net (NEE consolidated)	(61)	(6)
Other - net	(61)	(6)
Net cash provided by (used in) financing activities	1,568	157
Net increase in cash and cash equivalents	604	47
Cash and cash equivalents at beginning of period	577	438
Cash and cash equivalents at end of period	1,181	485
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,242	1,353
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	0	(1)
Capital contribution to FPL	(1,454)	(100)
Cash grants under the Recovery Act	0	0
Sale of independent power and other investments of NEER	0	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	(17)	(284)
Net cash used in investing activities	(1,471)	(385)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	0	0
Issuances of notes payable	0	0
Retirements of notes payable	0	0
Net change in commercial paper	0	0
Issuances of common stock	1,274	57
Dividends on common stock	(1,031)	(945)
Contributions from (dividends to) NEE	0	0
Other - net	(14)	(79)
Net cash provided by (used in) financing activities	229	(967)
Net increase in cash and cash equivalents	0	1
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	1
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,834	1,041
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(3,058)	(2,675)
Capital contribution to FPL	0	0
Cash grants under the Recovery Act	6	321
Sale of independent power and other investments of NEER	34	307
Proceeds from the sale of a noncontrolling interest in subsidiaries	319	438
Other - net	(4)	(78)
Net cash used in investing activities	(2,703)	(1,687)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	3,377	3,246
Retirements of long-term debt	(2,547)	(3,333)
Issuances of notes payable	1,450	501
Retirements of notes payable	(313)	0
Net change in commercial paper	780	(82)
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	(1,214)	295
Other - net	(77)	56
Net cash provided by (used in) financing activities	1,456	683
Net increase in cash and cash equivalents	587	37
Cash and cash equivalents at beginning of period	562	418
Cash and cash equivalents at end of period	1,149	455
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,437	1,574
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(2,618)	(2,382)
Capital contribution to FPL	1,454	100
Cash grants under the Recovery Act	0	0
Sale of independent power and other investments of NEER	0	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	(139)	276
Net cash used in investing activities	(1,303)	(2,006)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	85	998
Retirements of long-term debt	(550)	(355)
Issuances of notes payable	0	0
Retirements of notes payable	0	0
Net change in commercial paper	(896)	76
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	1,214	(295)
Other - net	30	17
Net cash provided by (used in) financing activities	(117)	441
Net increase in cash and cash equivalents	17	9
Cash and cash equivalents at beginning of period	15	20
Cash and cash equivalents at end of period	$ 32	$ 29