Summarized Financial Information of Capital Holdings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012		Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
NEECH a 100% owned subsidiary of NEE	100.00%				100.00%
Condensed Consolidating Statements of Income
Operating revenues	$ 3,833		$ 3,667		$ 7,112		$ 7,038
Operating expenses	(2,852)		(2,667)		(5,697)		(5,235)
Interest expense	(266)		(270)		(537)		(536)
Equity in earnings of subsidiaries	0		0		0		0
Other income (deductions) - net	106		120		196		200
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	821		850		1,074		1,467
Income tax expense (benefit)	211		243		379		399
Income from continuing operations	610		607		695		1,068
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	0		0		188		0
Net income (loss)	610		607		883		1,068
COMPREHENSIVE INCOME	644		511		1,036		1,032
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	66,411				66,411				64,917
Less accumulated depreciation and amortization	(15,951)				(15,951)				(15,504)
Total property, plant and equipment - net	50,460				50,460				49,413
CURRENT ASSETS
Cash and cash equivalents	411		295		411		295				377
Receivables	2,120				2,120				2,056
Other	2,204				2,204				2,852
Total current assets	4,735				4,735				5,237
OTHER ASSETS
Investment in subsidiaries	0				0				0
Other	10,022				10,022				9,789
Total other assets	10,022				10,022				9,789
TOTAL ASSETS	65,217				65,217				64,439
CAPITALIZATION
Common shareholders' equity	16,601				16,601				16,068
Long-term debt	23,514				23,514				23,177
Total capitalization	40,115				40,115				39,245
CURRENT LIABILITIES
Debt due within one year	4,718				4,718				4,182
Accounts payable	1,279				1,279				1,281
Other	2,870				2,870				3,416
Total current liabilities	8,867				8,867				8,879
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,774				1,774				1,715
Deferred income taxes	6,861				6,861				6,703
Other	7,600				7,600				7,897
Total other liabilities and deferred credits	16,235				16,235				16,315
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	65,217				65,217				64,439
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					2,250		1,928
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(3,154)		(4,030)
Capital contribution to FPL					0		0
Cash grants under the Recovery Act					170		3
Change in loan proceeds restricted for construction					207		95
Other - net					(8)		(89)
Net cash used in investing activities					(2,785)		(4,021)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					2,862		2,330
Retirements of long-term debt					(1,425)		(646)
Proceeds from sale of differential membership interests					201		337
Net change in short-term debt					(370)		170
Issuances of common stock					9		372
Dividends on common stock					(557)		(500)
Other Financing Activities, Not Otherwise Separately Disclosed					(103)		(52)
Proceeds from (Payments for) Other Financing Activities					(66)		(31)
Net cash provided by (used in) financing activities					617		2,011
Net increase (decrease) in cash and cash equivalents					82		(82)
Cash and cash equivalents at beginning of period					329		377				377
Cash and cash equivalents at end of period	411		295		411		295				377
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0		0		0		0
Operating expenses	(4)		(5)	[1]	(7)		(9)
Interest expense	(2)		(3)		(5)		(6)
Equity in earnings of subsidiaries	623		607		872		1,065
Other income (deductions) - net	(1)		2	[1]	1		2	[1]
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	616		601		861		1,052
Income tax expense (benefit)	6		(6)		(9)		(16)
Income from continuing operations					870		1,068
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					13		0
Net income (loss)	610		607		883		1,068
COMPREHENSIVE INCOME	644		511		1,036		1,032
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	32				32				31
Less accumulated depreciation and amortization	(9)				(9)				(7)
Total property, plant and equipment - net	23				23				24
CURRENT ASSETS
Cash and cash equivalents	0		1		0		1				1
Receivables	481				481				398
Other	9				9				432
Total current assets	490				490				832
OTHER ASSETS
Investment in subsidiaries	16,530				16,530				16,064
Other	716				716				647
Total other assets	17,246				17,246				16,711
TOTAL ASSETS	17,759				17,759				17,567
CAPITALIZATION
Common shareholders' equity	16,601				16,601				16,068
Long-term debt	0				0				0
Total capitalization	16,601				16,601				16,068
CURRENT LIABILITIES
Debt due within one year	0				0				0
Accounts payable	0				0				1
Other	520				520				440
Total current liabilities	520				520				441
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0				0				0
Deferred income taxes	106				106				497
Other	532				532				561
Total other liabilities and deferred credits	638				638				1,058
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	17,759				17,759				17,567
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					598		403
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					0		0
Capital contribution to FPL					0		(240)
Cash grants under the Recovery Act					0		0
Change in loan proceeds restricted for construction					0		0
Other - net					0		0
Net cash used in investing activities					0		(240)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					0		0
Retirements of long-term debt					0		0
Proceeds from sale of differential membership interests					0		0
Net change in short-term debt					0		0
Issuances of common stock					9		372
Dividends on common stock					(557)		(500)
Proceeds from (Payments for) Other Financing Activities					(52)		(35)
Net cash provided by (used in) financing activities					(600)		(163)
Net increase (decrease) in cash and cash equivalents					(2)		0
Cash and cash equivalents at beginning of period					2						1
Cash and cash equivalents at end of period	0		1		0		1				1
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Income
Operating revenues	1,140		1,090		2,234		2,241
Operating expenses	(878)		(747)	[1]	(2,078)		(1,572)	[1]
Interest expense	(161)		(163)		(331)		(324)
Equity in earnings of subsidiaries	0		0		0		0
Other income (deductions) - net	94		108	[1]	168		181	[1]
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	195		288		(7)		526
Income tax expense (benefit)	(36)		34		(25)		53
Income from continuing operations					18		473
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					175		0
Net income (loss)	231		254		193		473
COMPREHENSIVE INCOME	265		151		339		442
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27,528				27,528				26,638
Less accumulated depreciation and amortization	(5,291)				(5,291)				(4,800)
Total property, plant and equipment - net	22,237				22,237				21,838
CURRENT ASSETS
Cash and cash equivalents	381		269		381		269				339
Receivables	1,224				1,224				1,208
Other	1,036				1,036				1,421
Total current assets	2,641				2,641				2,916
OTHER ASSETS
Investment in subsidiaries	0				0				0
Other	4,696				4,696				4,749
Total other assets	4,696				4,696				4,749
TOTAL ASSETS	29,574				29,574				29,503
CAPITALIZATION
Common shareholders' equity	3,661				3,661				3,533
Long-term debt	15,015				15,015				14,848
Total capitalization	18,676				18,676				18,381
CURRENT LIABILITIES
Debt due within one year	4,017				4,017				3,624
Accounts payable	559				559				667
Other	1,863				1,863				2,317
Total current liabilities	6,439				6,439				6,608
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	536				536				508
Deferred income taxes	1,013				1,013				891
Other	2,910				2,910				3,115
Total other liabilities and deferred credits	4,459				4,459				4,514
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	29,574				29,574				29,503
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					657		667
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(1,647)		(1,767)
Capital contribution to FPL					0		0
Cash grants under the Recovery Act					170		3
Change in loan proceeds restricted for construction					207		95
Other - net					26		(48)
Net cash used in investing activities					(1,244)		(1,717)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					2,364		1,736
Retirements of long-term debt					(998)		(621)
Proceeds from sale of differential membership interests					201		337
Net change in short-term debt					(611)		(38)
Issuances of common stock					0		0
Dividends on common stock					0		0
Proceeds from (Payments for) Other Financing Activities					(275)		(434)
Net cash provided by (used in) financing activities					681		980
Net increase (decrease) in cash and cash equivalents					94		(70)
Cash and cash equivalents at beginning of period					287						339
Cash and cash equivalents at end of period	381		269		381		269				339
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	2,693	[2]	2,577	[2]	4,878	[2]	4,797	[2]
Operating expenses	(1,970)	[2]	(1,915)	[1],[2]	(3,612)	[2]	(3,654)	[1],[2]
Interest expense	(103)	[2]	(104)	[2]	(201)	[2]	(206)	[2]
Equity in earnings of subsidiaries	(623)	[2]	(607)	[2]	(872)	[2]	(1,065)	[2]
Other income (deductions) - net	13	[2]	10	[1],[2]	27	[2]	17	[1],[2]
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	10	[2]	(39)	[2]	220	[2]	(111)	[2]
Income tax expense (benefit)	241	[2]	215	[2]	413	[2]	362	[2]
Income from continuing operations					(193)	[2]	(473)	[2]
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					0	[2]	0	[2]
Net income (loss)	(231)	[2]	(254)	[2]	(193)	[2]	(473)	[2]
COMPREHENSIVE INCOME	(265)	[2]	(151)	[2]	(339)	[2]	(442)	[2]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	38,851	[2]			38,851	[2]			38,248	[2]
Less accumulated depreciation and amortization	(10,651)	[2]			(10,651)	[2]			(10,697)	[2]
Total property, plant and equipment - net	28,200	[2]			28,200	[2]			27,551	[2]
CURRENT ASSETS
Cash and cash equivalents	30	[2]	25	[2]	30	[2]	25	[2]			37	[2]
Receivables	415	[2]			415	[2]			450	[2]
Other	1,159	[2]			1,159	[2]			999	[2]
Total current assets	1,604	[2]			1,604	[2]			1,489	[2]
OTHER ASSETS
Investment in subsidiaries	(16,530)	[2]			(16,530)	[2]			(16,064)	[2]
Other	4,610	[2]			4,610	[2]			4,393	[2]
Total other assets	(11,920)	[2]			(11,920)	[2]			(11,671)	[2]
TOTAL ASSETS	17,884	[2]			17,884	[2]			17,369	[2]
CAPITALIZATION
Common shareholders' equity	(3,661)	[2]			(3,661)	[2]			(3,533)	[2]
Long-term debt	8,499	[2]			8,499	[2]			8,329	[2]
Total capitalization	4,838	[2]			4,838	[2]			4,796	[2]
CURRENT LIABILITIES
Debt due within one year	701	[2]			701	[2]			558	[2]
Accounts payable	720	[2]			720	[2]			613	[2]
Other	487	[2]			487	[2]			659	[2]
Total current liabilities	1,908	[2]			1,908	[2]			1,830	[2]
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,238	[2]			1,238	[2]			1,207	[2]
Deferred income taxes	5,742	[2]			5,742	[2]			5,315	[2]
Other	4,158	[2]			4,158	[2]			4,221	[2]
Total other liabilities and deferred credits	11,138	[2]			11,138	[2]			10,743	[2]
Commitments and Contingencies		[2]				[2]				[2]
TOTAL CAPITALIZATION AND LIABILITIES	17,884	[2]			17,884	[2]			17,369	[2]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					995	[2]	858	[2]
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(1,507)	[2]	(2,263)	[2]
Capital contribution to FPL					0	[2]	240	[2]
Cash grants under the Recovery Act					0	[2]	0	[2]
Change in loan proceeds restricted for construction					0	[2]	0	[2]
Other - net					(34)	[2]	(41)	[2]
Net cash used in investing activities					(1,541)	[2]	(2,064)	[2]
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					498	[2]	594	[2]
Retirements of long-term debt					(427)	[2]	(25)	[2]
Proceeds from sale of differential membership interests					0	[2]	0	[2]
Net change in short-term debt					241	[2]	208	[2]
Issuances of common stock					0		0
Dividends on common stock					0	[2]	0	[2]
Proceeds from (Payments for) Other Financing Activities					224	[2]	417	[2]
Net cash provided by (used in) financing activities					536	[2]	1,194	[2]
Net increase (decrease) in cash and cash equivalents					(10)	[2]	(12)	[2]
Cash and cash equivalents at beginning of period					40	[2]					37	[2]
Cash and cash equivalents at end of period	$ 30	[2]	$ 25	[2]	$ 30	[2]	$ 25	[2]			$ 37	[2]

[1] (b) Prior year amounts are restated to conform to the current year's presentation.

[2] (a) Represents FPL and consolidating adjustments.