Summarized Financial Information of Capital Holdings (Statement of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 3,270	$ 2,934
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(6,066)	(3,809)
Capital contributions from NEE	0	0
Sale of independent power and other investments of NEER	396	34
Proceeds from sale of a noncontrolling interest in subsidiaries	303	106
Other - net	(70)	(85)
Net cash used in investing activities	(5,437)	(3,754)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	2,509	1,706
Retirements of long-term debt	(996)	(1,403)
Proceeds from differential membership investors	219	41
PaymentsToDifferentialMembershipInvestors	(63)	(47)
Proceeds from notes payable	500	950
Repayments of notes payable	(12)	0
Net change in commercial paper	1,008	(321)
Issuances of common stock	43	630
Dividends on common stock	(803)	(683)
Contributions from (dividends to) NEE	0	0
Other - net (NEE consolidated)	(79)	(79)
Other - net	(79)	(79)
Net cash provided by (used in) financing activities	2,326	794
Net increase (decrease) in cash and cash equivalents	159	(26)
Cash and cash equivalents at beginning of period	571	577
Cash and cash equivalents at end of period	730	551
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	809	678
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	0	(1)
Capital contributions from NEE	(13)	(569)
Sale of independent power and other investments of NEER	0	0
Proceeds from sale of a noncontrolling interest in subsidiaries	0	0
Other - net	0	0
Net cash used in investing activities	(13)	(570)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	0
Retirements of long-term debt	0	0
Proceeds from differential membership investors	0	0
PaymentsToDifferentialMembershipInvestors	0	0
Proceeds from notes payable	0	0
Repayments of notes payable	0	0
Net change in commercial paper	0	0
Issuances of common stock	43	630
Dividends on common stock	(803)	(683)
Contributions from (dividends to) NEE	0	0
Other - net	(36)	(55)
Net cash provided by (used in) financing activities	(796)	(108)
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,084	851
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(3,866)	(2,180)
Capital contributions from NEE	0	0
Sale of independent power and other investments of NEER	396	34
Proceeds from sale of a noncontrolling interest in subsidiaries	303	106
Other - net	(54)	(31)
Net cash used in investing activities	(3,221)	(2,071)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	2,509	1,621
Retirements of long-term debt	(963)	(1,373)
Proceeds from differential membership investors	219	41
PaymentsToDifferentialMembershipInvestors	(63)	(47)
Proceeds from notes payable	0	950
Repayments of notes payable	(12)	0
Net change in commercial paper	701	627
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	(33)	(615)
Other - net	(53)	(42)
Net cash provided by (used in) financing activities	2,305	1,162
Net increase (decrease) in cash and cash equivalents	168	(58)
Cash and cash equivalents at beginning of period	546	562
Cash and cash equivalents at end of period	714	504
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,377	1,405
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases	(2,200)	(1,628)
Capital contributions from NEE	13	569
Sale of independent power and other investments of NEER	0	0
Proceeds from sale of a noncontrolling interest in subsidiaries	0	0
Other - net	(16)	(54)
Net cash used in investing activities	(2,203)	(1,113)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt	0	85
Retirements of long-term debt	(33)	(30)
Proceeds from differential membership investors	0	0
PaymentsToDifferentialMembershipInvestors	0	0
Proceeds from notes payable	500	0
Repayments of notes payable	0	0
Net change in commercial paper	307	(948)
Issuances of common stock	0	0
Dividends on common stock	0	0
Contributions from (dividends to) NEE	33	615
Other - net	10	18
Net cash provided by (used in) financing activities	817	(260)
Net increase (decrease) in cash and cash equivalents	(9)	32
Cash and cash equivalents at beginning of period	25	15
Cash and cash equivalents at end of period	$ 16	$ 47