Summarized Financial Information of NEECH (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2010
Consolidated Statements of Income [Abstract]
Operating revenues	$ 4,664	[1],[2]	$ 4,654	[1],[2]	$ 4,029	[1],[2]	$ 3,674	[1],[2]	$ 3,630	[1],[2]	$ 4,394	[1],[2]	$ 3,833	[1],[2]	$ 3,279	[1],[2]	$ 17,021		$ 15,136		$ 14,256
Operating expenses																	(12,637)		(11,895)		(10,980)
Interest expense																	(1,261)		(1,121)		(1,038)
Equity in earnings of subsidiaries																	0		0		0
Other income (deductions) - net																	522		334	[3]	365
Income from continuing operations before income taxes																	3,645		2,454	[3]	2,603
Income tax expense (benefit)																	1,176		777	[3]	692
Income (loss) from continuing operations	884	[1],[2]	664	[1],[2]	492	[1],[2]	430	[1],[2]	327	[1],[2]	698	[1],[2]	610	[1],[2]	41	[1],[2],[4],[5]	2,469		1,677	[3]	1,911
Gain from discontinued operations, net of income taxes																	0		231	[3],[6]	0
Net Income (loss)	884	[1],[2]	664	[1],[2]	492	[1],[2]	430	[1],[2]	327	[1],[2]	698	[1],[2]	610	[1],[2]	272	[1],[2],[5],[7]	2,469		1,908		1,911
Net income attributable to noncontrolling interest																	(4)		0		0
Net income (loss) attributable to parent	884	[1],[2]	660	[1],[2]	492	[1],[2]	430	[1],[2]									2,465		1,908		1,911
Comprehensive income (loss) attributable to NEE																	2,369		2,219		1,810
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	73,639								69,448								73,639		69,448		64,917
Less accumulated depreciation and amortization	(17,934)								(16,728)								(17,934)		(16,728)		(15,504)
Total property, plant and equipment - net	55,705								52,720								55,705		52,720
CURRENT ASSETS
Cash and cash equivalents	577								438								577		438		329		377
Receivables	2,159								2,289								2,159		2,289
Other	4,208								3,115								4,208		3,115
Total current assets	6,944								5,842								6,944		5,842
OTHER ASSETS
Investment in subsidiaries	0								0								0		0
Other	12,280								10,744								12,280		10,744
Total other assets	12,280								10,744								12,280		10,744
TOTAL ASSETS	74,929								69,306								74,929		69,306		64,439
CAPITALIZATION
Common shareholders' equity	19,916								18,040								19,916		18,040
Noncontrolling interests	252								0								252		0
Long-term debt	24,367								23,969								24,367		23,969
Total capitalization	44,535								42,009								44,535		42,009
CURRENT LIABILITIES
Debt due within one year	4,657								4,457								4,657		4,457
Accounts payable	1,354								1,200								1,354		1,200
Other	3,652								3,532								3,652		3,532
Total current liabilities	9,663								9,189								9,663		9,189
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,986								1,850								1,986		1,850
Deferred income taxes	9,261								8,144								9,261		8,144
Other	9,484								8,114								9,484		8,114
Total other liabilities and deferred credits	20,731								18,108								20,731		18,108
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	74,929								69,306								74,929		69,306
Condensed Consolidating Statements of Cash Flows [Abstract]
Net cash provided by operating activities																	5,500		5,102		3,992
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases																	(7,017)		(6,682)		(9,461)
Capital contributions from NEE																	0		0		0
Cash grants under the Recovery Act																	343		165		196
Sale of independent power and other investments of NEER																	307		165		0
Change in loan proceeds restricted for construction																	(40)		228		314
Proceeds from the sale of a noncontrolling interest in subsidiaries																	438		0		0
Other - net																	(392)		1		23
Net cash used in investing activities																	(6,361)		(6,123)		(8,928)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt																	5,054		4,371		6,630
Retirements of long-term debt																	(4,750)		(2,396)		(1,612)
Proceeds from sale of differential membership interests																	978		448		808
Net change in short-term debt																	451		(720)		61
Issuances of common stock - net																	633		842		405
Dividends on common stock																	(1,261)		(1,122)		(1,004)
Other - net																	(105)		(293)		(400)
Net cash provided by (used in) financing activities																	1,000		1,130		4,888
Net increase (decrease) in cash and cash equivalents																	139		109		(48)
Cash and cash equivalents at beginning of year							438								329		438		329		377		377
Cash and cash equivalents at end of year	577								438								577		438		329		377
NEE (Guarantor) [Member]
Consolidated Statements of Income [Abstract]
Operating revenues																	0		0		0
Operating expenses																	(19)		(18)		(21)
Interest expense																	(6)		(8)		(11)
Equity in earnings of subsidiaries																	2,494		1,915		1,925
Other income (deductions) - net																	1		2		7
Income from continuing operations before income taxes																	2,470		1,891		1,900
Income tax expense (benefit)																	5		(2)		(11)
Income (loss) from continuing operations																	2,465		1,893		1,911
Gain from discontinued operations, net of income taxes																	0		15		0
Net Income (loss)																	2,465		1,908		1,911
Net income attributable to noncontrolling interest																	0		0		0
Net income (loss) attributable to parent																	2,465		1,908		1,911
Comprehensive income (loss) attributable to NEE																	2,369		2,219		1,810
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27								31								27		31
Less accumulated depreciation and amortization	(12)								(10)								(12)		(10)
Total property, plant and equipment - net	15								21								15		21
CURRENT ASSETS
Cash and cash equivalents	0								0								0		0		2
Receivables	82								78								82		78
Other	19								6								19		6
Total current assets	101								84								101		84
OTHER ASSETS
Investment in subsidiaries	19,703								17,910								19,703		17,910
Other	736								694								736		694
Total other assets	20,439								18,604								20,439		18,604
TOTAL ASSETS	20,555								18,709								20,555		18,709
CAPITALIZATION
Common shareholders' equity	19,916								18,040								19,916		18,040
Noncontrolling interests	0								0								0		0
Long-term debt	0								0								0		0
Total capitalization	19,916								18,040								19,916		18,040
CURRENT LIABILITIES
Debt due within one year	0								0								0		0
Accounts payable	0								0								0		0
Other	182								199								182		199
Total current liabilities	182								199								182		199
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0								0								0		0
Deferred income taxes	149								166								149		166
Other	308								304								308		304
Total other liabilities and deferred credits	457								470								457		470
TOTAL CAPITALIZATION AND LIABILITIES	20,555								18,709								20,555		18,709
Condensed Consolidating Statements of Cash Flows [Abstract]
Net cash provided by operating activities																	1,615		1,147		1,166
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases																	(1)		0		0
Capital contributions from NEE																	(912)		(777)		(440)
Cash grants under the Recovery Act																	0		0		0
Sale of independent power and other investments of NEER																	0		0		0
Change in loan proceeds restricted for construction																	0		0		0
Proceeds from the sale of a noncontrolling interest in subsidiaries																	0		0		0
Other - net																	10		0		1
Net cash used in investing activities																	(903)		(777)		(439)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt																	0		0		0
Retirements of long-term debt																	0		0		0
Proceeds from sale of differential membership interests																	0		0		0
Net change in short-term debt																	0		0		0
Issuances of common stock - net																	633		842		405
Dividends on common stock																	(1,261)		(1,122)		(1,004)
Other - net																	(84)		(92)		(127)
Net cash provided by (used in) financing activities																	(712)		(372)		(726)
Net increase (decrease) in cash and cash equivalents																	0		(2)		1
Cash and cash equivalents at beginning of year							0								2		0		2		1
Cash and cash equivalents at end of year	0								0								0		0		2
NEECH [Member]
Condensed Financial Statements, Captions [Line Items]
Ownership interest	100.00%																100.00%
Consolidated Statements of Income [Abstract]
Operating revenues																	5,614		4,703		4,154
Operating expenses																	(4,039)		(3,983)		(3,214)
Interest expense																	(819)		(705)		(619)
Equity in earnings of subsidiaries																	0		0		0
Other income (deductions) - net																	487		281	[3]	313
Income from continuing operations before income taxes																	1,243		296	[3]	634
Income tax expense (benefit)																	262		(55)	[3]	(50)
Income (loss) from continuing operations																	981		351	[3]	684
Gain from discontinued operations, net of income taxes																	0		216	[3]	0
Net Income (loss)																	981		567		684
Net income attributable to noncontrolling interest																	(4)		0		0
Net income (loss) attributable to parent																	977		567		684
Comprehensive income (loss) attributable to NEE																	924		781		611
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	31,674								29,511								31,674		29,511
Less accumulated depreciation and amortization	(6,640)								(5,774)								(6,640)		(5,774)
Total property, plant and equipment - net	25,034								23,737								25,034		23,737
CURRENT ASSETS
Cash and cash equivalents	562								418								562		418		287
Receivables	1,378								1,542								1,378		1,542
Other	2,512								1,814								2,512		1,814
Total current assets	4,452								3,774								4,452		3,774
OTHER ASSETS
Investment in subsidiaries	0								0								0		0
Other	6,066								5,129								6,066		5,129
Total other assets	6,066								5,129								6,066		5,129
TOTAL ASSETS	35,552								32,640								35,552		32,640
CAPITALIZATION
Common shareholders' equity	6,552								4,816								6,552		4,816
Noncontrolling interests	252								0								252		0
Long-term debt	14,954								15,496								14,954		15,496
Total capitalization	21,758								20,312								21,758		20,312
CURRENT LIABILITIES
Debt due within one year	3,455								3,896								3,455		3,896
Accounts payable	707								589								707		589
Other	2,075								2,203								2,075		2,203
Total current liabilities	6,237								6,688								6,237		6,688
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	631								565								631		565
Deferred income taxes	2,608								1,963								2,608		1,963
Other	4,318								3,112								4,318		3,112
Total other liabilities and deferred credits	7,557								5,640								7,557		5,640
TOTAL CAPITALIZATION AND LIABILITIES	35,552								32,640								35,552		32,640
Condensed Consolidating Statements of Cash Flows [Abstract]
Net cash provided by operating activities																	1,976		1,466		1,091
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases																	(3,741)		(3,756)		(5,176)
Capital contributions from NEE																	0		0		0
Cash grants under the Recovery Act																	343		165		196
Sale of independent power and other investments of NEER																	307		165		0
Change in loan proceeds restricted for construction																	(40)		228		314
Proceeds from the sale of a noncontrolling interest in subsidiaries																	438		0		0
Other - net																	(73)		17		20
Net cash used in investing activities																	(2,766)		(3,181)		(4,646)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt																	4,057		3,874		5,334
Retirements of long-term debt																	(4,395)		(1,943)		(1,562)
Proceeds from sale of differential membership interests																	978		448		808
Net change in short-term debt																	(487)		(819)		286
Issuances of common stock - net																	0		0		0
Dividends on common stock																	0		0		0
Other - net																	781		286		(1,363)
Net cash provided by (used in) financing activities																	934		1,846		3,503
Net increase (decrease) in cash and cash equivalents																	144		131		(52)
Cash and cash equivalents at beginning of year							418								287		418		287		339
Cash and cash equivalents at end of year	562								418								562		418		287
Other [Member]
Consolidated Statements of Income [Abstract]
Operating revenues																	11,407	[8]	10,433	[8]	10,102	[8]
Operating expenses																	(8,579)	[8]	(7,894)	[8]	(7,745)	[8]
Interest expense																	(436)	[8]	(408)	[8]	(408)	[8]
Equity in earnings of subsidiaries																	(2,494)	[8]	(1,915)	[8]	(1,925)	[8]
Other income (deductions) - net																	34	[8]	51	[3],[8]	45	[8]
Income from continuing operations before income taxes																	(68)	[8]	267	[3],[8]	69	[8]
Income tax expense (benefit)																	909	[8]	834	[3],[8]	753	[8]
Income (loss) from continuing operations																	(977)	[8]	(567)	[3],[8]	(684)	[8]
Gain from discontinued operations, net of income taxes																	0	[8]	0	[3],[8]	0	[8]
Net Income (loss)																	(977)	[8]	(567)	[8]	(684)	[8]
Net income attributable to noncontrolling interest																	0	[8]	0	[8]	0	[8]
Net income (loss) attributable to parent																	(977)	[8]	(567)	[8]	(684)	[8]
Comprehensive income (loss) attributable to NEE																	(924)		(781)		(611)
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	41,938	[8]							39,906	[8]							41,938	[8]	39,906	[8]
Less accumulated depreciation and amortization	(11,282)	[8]							(10,944)	[8]							(11,282)	[8]	(10,944)	[8]
Total property, plant and equipment - net	30,656	[8]							28,962	[8]							30,656	[8]	28,962	[8]
CURRENT ASSETS
Cash and cash equivalents	15	[8]							20	[8]							15	[8]	20	[8]	40	[8]
Receivables	699	[8]							669	[8]							699	[8]	669	[8]
Other	1,677	[8]							1,295	[8]							1,677	[8]	1,295	[8]
Total current assets	2,391	[8]							1,984	[8]							2,391	[8]	1,984	[8]
OTHER ASSETS
Investment in subsidiaries	(19,703)	[8]							(17,910)	[8]							(19,703)	[8]	(17,910)	[8]
Other	5,478	[8]							4,921	[8]							5,478	[8]	4,921	[8]
Total other assets	(14,225)	[8]							(12,989)	[8]							(14,225)	[8]	(12,989)	[8]
TOTAL ASSETS	18,822	[8]							17,957	[8]							18,822	[8]	17,957	[8]
CAPITALIZATION
Common shareholders' equity	(6,552)	[8]							(4,816)	[8]							(6,552)	[8]	(4,816)	[8]
Noncontrolling interests	0	[8]							0	[8]							0	[8]	0	[8]
Long-term debt	9,413	[8]							8,473	[8]							9,413	[8]	8,473	[8]
Total capitalization	2,861	[8]							3,657	[8]							2,861	[8]	3,657	[8]
CURRENT LIABILITIES
Debt due within one year	1,202	[8]							561	[8]							1,202	[8]	561	[8]
Accounts payable	647	[8]							611	[8]							647	[8]	611	[8]
Other	1,395	[8]							1,130	[8]							1,395	[8]	1,130	[8]
Total current liabilities	3,244	[8]							2,302	[8]							3,244	[8]	2,302	[8]
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,355	[8]							1,285	[8]							1,355	[8]	1,285	[8]
Deferred income taxes	6,504	[8]							6,015	[8]							6,504	[8]	6,015	[8]
Other	4,858	[8]							4,698	[8]							4,858	[8]	4,698	[8]
Total other liabilities and deferred credits	12,717	[8]							11,998	[8]							12,717	[8]	11,998	[8]
TOTAL CAPITALIZATION AND LIABILITIES	18,822	[8]							17,957	[8]							18,822	[8]	17,957	[8]
Condensed Consolidating Statements of Cash Flows [Abstract]
Net cash provided by operating activities																	1,909	[8]	2,489	[8]	1,735	[8]
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases																	(3,275)	[8]	(2,926)	[8]	(4,285)	[8]
Capital contributions from NEE																	912	[8]	777	[8]	440	[8]
Cash grants under the Recovery Act																	0	[8]	0	[8]	0	[8]
Sale of independent power and other investments of NEER																	0	[8]	0	[8]	0	[8]
Change in loan proceeds restricted for construction																	0	[8]	0	[8]	0	[8]
Proceeds from the sale of a noncontrolling interest in subsidiaries																	0	[8]	0	[8]	0	[8]
Other - net																	(329)	[8]	(16)	[8]	2	[8]
Net cash used in investing activities																	(2,692)	[8]	(2,165)	[8]	(3,843)	[8]
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt																	997	[8]	497	[8]	1,296	[8]
Retirements of long-term debt																	(355)	[8]	(453)	[8]	(50)	[8]
Proceeds from sale of differential membership interests																	0	[8]	0	[8]	0	[8]
Net change in short-term debt																	938	[8]	99	[8]	(225)	[8]
Issuances of common stock - net																	0	[8]	0	[8]	0	[8]
Dividends on common stock																	0	[8]	0	[8]	0	[8]
Other - net																	(802)	[8]	(487)	[8]	1,090	[8]
Net cash provided by (used in) financing activities																	778	[8]	(344)	[8]	2,111	[8]
Net increase (decrease) in cash and cash equivalents																	(5)	[8]	(20)	[8]	3	[8]
Cash and cash equivalents at beginning of year							20	[8]							40	[8]	20	[8]	40	[8]	37	[8]
Cash and cash equivalents at end of year	$ 15	[8]							$ 20	[8]							$ 15	[8]	$ 20	[8]	$ 40	[8]

[1] In the opinion of NEE and FPL, all adjustments, which consist of normal recurring accruals necessary to present a fair statement of the amounts shown for such periods, have been made. Results of operations for an interim period generally will not give a true indication of results for the year.

[2] The sum of the quarterly amounts may not equal the total for the year due to rounding.

[3] 2013 amounts were reclassified to conform to current year's presentation. See Note 4 - Nonrecurring Fair Value Measurements.

[4] First quarter of 2013 was reclassified to conform to current year's presentation. See Note 4 - Nonrecurring Fair Value Measurements.

[5] First quarter of 2013 includes impairment and other related charges. See Note 4 - Nonrecurring Fair Value Measurements.

[6] See Note 6.

[7] First quarter of 2013 includes an after-tax gain from discontinued operations. See Note 6.

[8] Represents FPL and consolidating adjustments.