Summarized Financial Information of Capital Holdings (Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 2,934	$ 2,448
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(3,809)	(3,239)
Capital contribution to FPL	0	0
Cash Grants Under American Recovery And Reinvestment Act Of 2009	0	306
Sale of independent power and other investments of NEER	34	273
Change in loan proceeds restricted for construction	(62)	(366)
Proceeds from the sale of a noncontrolling interest in subsidiaries	106	0
Other - net	(23)	(79)
Net cash used in investing activities	(3,754)	(3,105)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	1,706	2,729
Retirements of long-term debt	(1,403)	(2,275)
Net change in short-term debt	629	925
Proceeds from Issuance of Common Stock	630	42
Dividends on common stock	(683)	(630)
Dividends to NEE	0	0
Other Financing Activities, Not Otherwise Separately Disclosed	(85)	50
Proceeds from (Payments for) Other Financing Activities	(85)	50
Net cash provided by (used in) financing activities	794	841
Net increase (decrease) in cash and cash equivalents	(26)	184
Cash and cash equivalents at beginning of period	577	438
Cash and cash equivalents at end of period	551	622
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	678	754
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(1)	0
Capital contribution to FPL	(550)	(100)
Cash Grants Under American Recovery And Reinvestment Act Of 2009	0	0
Sale of independent power and other investments of NEER	0	0
Change in loan proceeds restricted for construction	0	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	(19)	7
Net cash used in investing activities	(570)	(93)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	0	0
Net change in short-term debt	0	0
Proceeds from Issuance of Common Stock	630	42
Dividends on common stock	(683)	(630)
Dividends to NEE	0	0
Proceeds from (Payments for) Other Financing Activities	(55)	(54)
Net cash provided by (used in) financing activities	(108)	(642)
Net increase (decrease) in cash and cash equivalents	0	19
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	19
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	851	659
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(2,180)	(1,562)
Capital contribution to FPL	0	0
Cash Grants Under American Recovery And Reinvestment Act Of 2009	0	306
Sale of independent power and other investments of NEER	34	273
Change in loan proceeds restricted for construction	3	(366)
Proceeds from the sale of a noncontrolling interest in subsidiaries	106	0
Other - net	(34)	(49)
Net cash used in investing activities	(2,071)	(1,398)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	1,621	2,229
Retirements of long-term debt	(1,373)	(1,946)
Net change in short-term debt	1,577	678
Proceeds from Issuance of Common Stock	0	0
Dividends on common stock	0	0
Dividends to NEE	(615)	(187)
Proceeds from (Payments for) Other Financing Activities	(48)	92
Net cash provided by (used in) financing activities	1,162	866
Net increase (decrease) in cash and cash equivalents	(58)	127
Cash and cash equivalents at beginning of period	562	418
Cash and cash equivalents at end of period	504	545
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,405	1,035
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(1,628)	(1,677)
Capital contribution to FPL	550	100
Cash Grants Under American Recovery And Reinvestment Act Of 2009	0	0
Sale of independent power and other investments of NEER	0	0
Change in loan proceeds restricted for construction	(65)	0
Proceeds from the sale of a noncontrolling interest in subsidiaries	0	0
Other - net	30	(37)
Net cash used in investing activities	(1,113)	(1,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	85	500
Retirements of long-term debt	(30)	(329)
Net change in short-term debt	(948)	247
Proceeds from Issuance of Common Stock	0	0
Dividends on common stock	0	0
Dividends to NEE	615	187
Proceeds from (Payments for) Other Financing Activities	18	12
Net cash provided by (used in) financing activities	(260)	617
Net increase (decrease) in cash and cash equivalents	32	38
Cash and cash equivalents at beginning of period	15	20
Cash and cash equivalents at end of period	$ 47	$ 58