Summarized Financial Information of Capital Holdings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 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	$ 4,394		$ 3,843		$ 11,506		$ 10,881
Operating expenses(b)	(3,209)		(3,101)		(8,905)		(8,336)
Interest expense	(288)		(259)		(825)		(795)
Equity in earnings of subsidiaries	0		0		0		0
Other income - net(b)	98		86		294		285
Income (loss) before income taxes	(995)		(569)		(2,070)		(2,035)
Income tax expense (benefit)	297		154		677		553
Income (loss) from continuing operations	698		415		1,393		1,482
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	0		0		188		0
Net income (loss)	698		415		1,581		1,482
COMPREHENSIVE INCOME	718		386		1,754		1,417
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	67,855				67,855				64,917
Less accumulated depreciation and amortization	(16,456)				(16,456)				(15,504)
Total property, plant and equipment - net	51,399				51,399				49,413
CURRENT ASSETS
Cash and cash equivalents	558		246		558		246				377
Receivables	2,241				2,241				2,056
Other	2,673				2,673				2,852
Total current assets	5,472				5,472				5,237
OTHER ASSETS
Investment in subsidiaries	0				0				0
Other	10,295				10,295				9,789
Total other assets	10,295				10,295				9,789
TOTAL ASSETS	67,166				67,166				64,439
CAPITALIZATION
Common shareholders' equity	17,409				17,409				16,068
Long-term debt	23,862				23,862				23,177
Total capitalization	41,271				41,271				39,245
CURRENT LIABILITIES
Debt due within one year	4,848				4,848				4,182
Accounts payable	1,244				1,244				1,281
Other	3,121				3,121				3,416
Total current liabilities	9,213				9,213				8,879
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,808				1,808				1,715
Deferred income taxes	7,207				7,207				6,703
Other	7,667				7,667				7,897
Total other liabilities and deferred credits	16,682				16,682				16,315
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	67,166				67,166				64,439
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					3,390		3,157
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(4,659)		(6,689)
Capital contribution to FPL					0		0
Cash grants under the Recovery Act					170		105
Change in loan proceeds restricted for construction					245		212
Other - net					(22)		(129)
Net cash used in investing activities					(4,266)		(6,501)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					3,653		4,226
Retirements of long-term debt					(1,669)		(1,321)
Proceeds from sale of differential membership interests					201		414
Net change in short-term debt					(495)		396
Issuances of common stock					415		386
Dividends on common stock					(836)		(752)
Other Financing Activities, Not Otherwise Separately Disclosed					(164)		(136)
Proceeds from (Payments for) Other Financing Activities					(117)		(64)
Net cash provided by (used in) financing activities					1,105		3,213
Net increase (decrease) in cash and cash equivalents					229		(131)
Cash and cash equivalents at beginning of period					329		377				377
Cash and cash equivalents at end of period	558		246		558		246				377
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0		0		0		0
Operating expenses(b)	(4)		(5)	[1]	(11)		(13)
Interest expense	(2)		(2)		(7)		(8)
Equity in earnings of subsidiaries	700		416		1,572		1,480
Other income - net(b)	0		4	[1]	1		5	[1]
Income (loss) before income taxes	(694)		(413)		(1,555)		(1,464)
Income tax expense (benefit)	(4)		(2)		(13)		(18)
Income (loss) from continuing operations					1,568		1,482
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					13		0
Net income (loss)	698		415		1,581		1,482
COMPREHENSIVE INCOME	718		386		1,754		1,417
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	32				32				31
Less accumulated depreciation and amortization	(10)				(10)				(7)
Total property, plant and equipment - net	22				22				24
CURRENT ASSETS
Cash and cash equivalents	1		1		1		1				1
Receivables	198				198				398
Other	9				9				432
Total current assets	208				208				832
OTHER ASSETS
Investment in subsidiaries	17,398				17,398				16,064
Other	720				720				647
Total other assets	18,118				18,118				16,711
TOTAL ASSETS	18,348				18,348				17,567
CAPITALIZATION
Common shareholders' equity	17,409				17,409				16,068
Long-term debt	0				0				0
Total capitalization	17,409				17,409				16,068
CURRENT LIABILITIES
Debt due within one year	0				0				0
Accounts payable	0				0				1
Other	195				195				440
Total current liabilities	195				195				441
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0				0				0
Deferred income taxes	186				186				497
Other	558				558				561
Total other liabilities and deferred credits	744				744				1,058
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	18,348				18,348				17,567
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					1,174		662
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					(668)		0
Net cash used in investing activities					(668)		(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					415		386
Dividends on common stock					(836)		(752)
Proceeds from (Payments for) Other Financing Activities					(86)		(56)
Net cash provided by (used in) financing activities					(507)		(422)
Net increase (decrease) in cash and cash equivalents					(1)		0
Cash and cash equivalents at beginning of period					2						1
Cash and cash equivalents at end of period	1		1		1		1				1
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Income
Operating revenues	1,377		871		3,611		3,112
Operating expenses(b)	(965)		(843)	[1]	(3,043)		(2,416)	[1]
Interest expense	(182)		(155)		(513)		(479)
Equity in earnings of subsidiaries	0		0		0		0
Other income - net(b)	87		68	[1]	254		250	[1]
Income (loss) before income taxes	(317)		59		(309)		(467)
Income tax expense (benefit)	38		(82)		13		(29)
Income (loss) from continuing operations					296		496
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					175		0
Net income (loss)	279		23		471		496
COMPREHENSIVE INCOME	298		(6)		636		437
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	28,439				28,439				26,638
Less accumulated depreciation and amortization	(5,562)				(5,562)				(4,800)
Total property, plant and equipment - net	22,877				22,877				21,838
CURRENT ASSETS
Cash and cash equivalents	504		226		504		226				339
Receivables	1,212				1,212				1,208
Other	1,515				1,515				1,421
Total current assets	3,231				3,231				2,916
OTHER ASSETS
Investment in subsidiaries	0				0				0
Other	4,942				4,942				4,749
Total other assets	4,942				4,942				4,749
TOTAL ASSETS	31,050				31,050				29,503
CAPITALIZATION
Common shareholders' equity	4,838				4,838				3,533
Long-term debt	15,388				15,388				14,848
Total capitalization	20,226				20,226				18,381
CURRENT LIABILITIES
Debt due within one year	3,913				3,913				3,624
Accounts payable	613				613				667
Other	1,711				1,711				2,317
Total current liabilities	6,237				6,237				6,608
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	554				554				508
Deferred income taxes	1,193				1,193				891
Other	2,840				2,840				3,115
Total other liabilities and deferred credits	4,587				4,587				4,514
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	31,050				31,050				29,503
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					494		878
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(2,450)		(3,492)
Capital contribution to FPL					0		0
Cash grants under the Recovery Act					170		105
Change in loan proceeds restricted for construction					245		212
Other - net					20		(59)
Net cash used in investing activities					(2,015)		(3,234)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					3,155		3,632
Retirements of long-term debt					(1,216)		(1,272)
Proceeds from sale of differential membership interests					201		414
Net change in short-term debt					(971)		254
Issuances of common stock					0		0
Dividends on common stock					0		0
Proceeds from (Payments for) Other Financing Activities					569		(785)
Net cash provided by (used in) financing activities					1,738		2,243
Net increase (decrease) in cash and cash equivalents					217		(113)
Cash and cash equivalents at beginning of period					287						339
Cash and cash equivalents at end of period	504		226		504		226				339
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	3,017	[2]	2,972	[2]	7,895	[2]	7,769	[2]
Operating expenses(b)	(2,240)	[2]	(2,253)	[1],[2]	(5,851)	[2]	(5,907)	[1],[2]
Interest expense	(104)	[2]	(102)	[2]	(305)	[2]	(308)	[2]
Equity in earnings of subsidiaries	(700)	[2]	(416)	[2]	(1,572)	[2]	(1,480)	[2]
Other income - net(b)	11	[2]	14	[1],[2]	39	[2]	30	[1],[2]
Income (loss) before income taxes	16	[2]	(215)	[2]	(206)	[2]	(104)	[2]
Income tax expense (benefit)	263	[2]	238	[2]	677	[2]	600	[2]
Income (loss) from continuing operations					(471)	[2]	(496)	[2]
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES					0	[2]	0	[2]
Net income (loss)	(279)	[2]	(23)	[2]	(471)	[2]	(496)	[2]
COMPREHENSIVE INCOME	(298)	[2]	6	[2]	(636)	[2]	(437)	[2]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	39,384	[2]			39,384	[2]			38,248	[2]
Less accumulated depreciation and amortization	(10,884)	[2]			(10,884)	[2]			(10,697)	[2]
Total property, plant and equipment - net	28,500	[2]			28,500	[2]			27,551	[2]
CURRENT ASSETS
Cash and cash equivalents	53	[2]	19	[2]	53	[2]	19	[2]			37	[2]
Receivables	831	[2]			831	[2]			450	[2]
Other	1,149	[2]			1,149	[2]			999	[2]
Total current assets	2,033	[2]			2,033	[2]			1,489	[2]
OTHER ASSETS
Investment in subsidiaries	(17,398)	[2]			(17,398)	[2]			(16,064)	[2]
Other	4,633	[2]			4,633	[2]			4,393	[2]
Total other assets	(12,765)	[2]			(12,765)	[2]			(11,671)	[2]
TOTAL ASSETS	17,768	[2]			17,768	[2]			17,369	[2]
CAPITALIZATION
Common shareholders' equity	(4,838)	[2]			(4,838)	[2]			(3,533)	[2]
Long-term debt	8,474	[2]			8,474	[2]			8,329	[2]
Total capitalization	3,636	[2]			3,636	[2]			4,796	[2]
CURRENT LIABILITIES
Debt due within one year	935	[2]			935	[2]			558	[2]
Accounts payable	631	[2]			631	[2]			613	[2]
Other	1,215	[2]			1,215	[2]			659	[2]
Total current liabilities	2,781	[2]			2,781	[2]			1,830	[2]
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,254	[2]			1,254	[2]			1,207	[2]
Deferred income taxes	5,828	[2]			5,828	[2]			5,315	[2]
Other	4,269	[2]			4,269	[2]			4,221	[2]
Total other liabilities and deferred credits	11,351	[2]			11,351	[2]			10,743	[2]
COMMITMENTS AND CONTINGENCIES		[2]				[2]				[2]
TOTAL CAPITALIZATION AND LIABILITIES	17,768	[2]			17,768	[2]			17,369	[2]
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES					1,722	[2]	1,617	[2]
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases					(2,209)	[2]	(3,197)	[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					626	[2]	(70)	[2]
Net cash used in investing activities					(1,583)	[2]	(3,027)	[2]
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt					498	[2]	594	[2]
Retirements of long-term debt					(453)	[2]	(49)	[2]
Proceeds from sale of differential membership interests					0	[2]	0	[2]
Net change in short-term debt					476	[2]	142	[2]
Issuances of common stock					0		0
Dividends on common stock					0	[2]	0	[2]
Proceeds from (Payments for) Other Financing Activities					(647)	[2]	705	[2]
Net cash provided by (used in) financing activities					(126)	[2]	1,392	[2]
Net increase (decrease) in cash and cash equivalents					13	[2]	(18)	[2]
Cash and cash equivalents at beginning of period					40	[2]					37	[2]
Cash and cash equivalents at end of period	$ 53	[2]	$ 19	[2]	$ 53	[2]	$ 19	[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.