Summarized Financial Information of Capital Holdings (Statement of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 1,181	$ 1,017
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(1,566)	(1,866)
Capital contribution to FPL	0	0
Change in loan proceeds restricted for construction	2	(28)
Other - net	0	52
Net cash used in investing activities	(1,564)	(1,842)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	194	655
Retirements of long-term debt	(170)	(717)
Net change in short-term debt	603	1,179
Dividends on common stock	(341)	(315)
Dividends to NEE	0	0
Other Financing Activities, Not Otherwise Separately Disclosed	(11)	73
Proceeds from (Payments for) Other Financing Activities	(6)	70
Net cash provided by (used in) financing activities	275	875
Net increase (decrease) in cash and cash equivalents	(108)	50
Cash and cash equivalents at beginning of period	577	438
Cash and cash equivalents at end of period	469	488
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	907	428
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	0	0
Capital contribution to FPL	(550)	(100)
Change in loan proceeds restricted for construction	0	0
Other - net	(1)	0
Net cash used in investing activities	(551)	(100)
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
Dividends on common stock	(341)	(315)
Dividends to NEE	0	0
Proceeds from (Payments for) Other Financing Activities	(15)	(8)
Net cash provided by (used in) financing activities	(356)	(323)
Net increase (decrease) in cash and cash equivalents	0	5
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	5
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	225	147
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(801)	(798)
Capital contribution to FPL	0	0
Change in loan proceeds restricted for construction	2	(28)
Other - net	0	58
Net cash used in investing activities	(799)	(768)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	194	655
Retirements of long-term debt	(139)	(688)
Net change in short-term debt	1,325	1,059
Dividends on common stock	0	0
Dividends to NEE	(902)	(433)
Proceeds from (Payments for) Other Financing Activities	(25)	55
Net cash provided by (used in) financing activities	453	648
Net increase (decrease) in cash and cash equivalents	(121)	27
Cash and cash equivalents at beginning of period	562	418
Cash and cash equivalents at end of period	441	445
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	49	442
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(765)	(1,068)
Capital contribution to FPL	550	100
Change in loan proceeds restricted for construction	0	0
Other - net	1	(6)
Net cash used in investing activities	(214)	(974)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	(31)	(29)
Net change in short-term debt	(722)	120
Dividends on common stock	0	0
Dividends to NEE	902	433
Proceeds from (Payments for) Other Financing Activities	29	26
Net cash provided by (used in) financing activities	178	550
Net increase (decrease) in cash and cash equivalents	13	18
Cash and cash equivalents at beginning of period	15	20
Cash and cash equivalents at end of period	$ 28	$ 38