Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources (in hundredths)	70.00%																70.00%
Percentage of operating revenues derived from the sale of electricity (in hundredths)																	92.00%		93.00%		95.00%
Maximum percentage of operating revenues from foreign sources (in hundredths)																	1.00%		1.00%		1.00%
Maximum percentage of long-lived assets located in foreign countries (in hundredths)	4.00%								4.00%								4.00%		4.00%
Operating revenues	$ 3,630	[1],[2]	$ 4,394	[1],[2]	$ 3,833	[1],[2]	$ 3,279	[1],[2]	$ 3,375	[1],[2]	$ 3,843	[1],[2]	$ 3,667	[1],[2]	$ 3,371	[1],[2]	$ 15,136		$ 14,256		$ 15,341
Operating expenses																	11,895		10,980		12,080
Interest expense																	1,121		1,038		1,035
Interest income																	78		86		79
Depreciation and amortization																	2,163		1,518		1,567
Equity in earnings of equity method investees																	25		13		55
Income tax expense (benefit)																	801		692		529
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																	2,521		2,603		2,452
Income (loss) from continuing operations	327	[1],[2]	698	[1],[2]	610	[1],[2]	272	[1],[2],[3],[4]	429	[1],[2]	415	[1],[2]	607	[1],[2]	461	[1],[2]	1,908		1,911		1,923
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES																	188		0		0
Capital expenditures, independent power and other investments and nuclear fuel purchases																	6,682		9,461		6,628
Property, plant and equipment	69,448								64,917								69,448		64,917
Accumulated depreciation and amortization	16,728								15,504								16,728		15,504
Total assets	69,306								64,439								69,306		64,439
Investment in equity method investees	0								0								0		0
Sale of natural gas-fired generating assets																	0		0		151
Impairment charges																	300		0		51
Assets held for sale	0								335								0		335
NEER [Member]
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources (in hundredths)	70.00%																70.00%
Operating revenues																	4,333	[5]	3,895	[5]	4,502	[5]
Operating expenses																	3,730	[5],[6]	3,024	[5]	3,351	[5],[6]
Interest expense																	528	[5]	474	[5]	530	[5]
Interest income																	19	[5]	20	[5]	23	[5]
Depreciation and amortization																	949	[5]	818	[5]	736	[5]
Equity in earnings of equity method investees																	26	[5]	19	[5]	55	[5]
Income tax expense (benefit)																	(16)	[5],[7]	(7)	[5],[7]	(24)	[5],[7]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																	381	[5],[6]	687	[5]	774	[5],[6],[8]
Income (loss) from continuing operations																	556	[5],[6],[8]	687		774	[6],[8]
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES																	175	[5],[9]	0		0
Capital expenditures, independent power and other investments and nuclear fuel purchases																	3,613	[5]	4,681	[5]	2,774	[5]
Property, plant and equipment	28,080	[5]							25,333	[5]							28,080	[5]	25,333	[5]	21,482	[5]
Accumulated depreciation and amortization	5,455	[5]							4,535	[5]							5,455	[5]	4,535	[5]	3,914	[5]
Total assets	30,154	[5]							27,139	[10],[5]							30,154	[5]	27,139	[10],[5]	23,459	[5]
Investment in equity method investees	365	[5]							243	[5]							365	[5]	243	[5]	193	[5]
Sale of natural gas-fired generating assets																					92
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues																	358		247		226
Operating expenses																	259		199		192
Interest expense																	178		147		118
Interest income																	53		60		53
Depreciation and amortization																	55		41		33
Equity in earnings of equity method investees																	(1)		(6)		0
Income tax expense (benefit)																	(18)	[11]	(53)		(101)	[11]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																	(10)		(16)		81	[8]
Income (loss) from continuing operations																	3		(16)		81	[8]
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES																	13		0		0
Capital expenditures, independent power and other investments and nuclear fuel purchases																	166		495		352
Property, plant and equipment	1,472								1,335								1,472		1,335		900
Accumulated depreciation and amortization	329								271								329		271		232
Total assets	2,664								2,447								2,664		2,447		1,913
Investment in equity method investees	57								19								57		19		9
Sale of natural gas-fired generating assets																					6
Deferred state tax benefit related to recent state tax law changes																					64
Deferred tax benefit related to dissolution of subsidiary																					41
Total Reporting Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues																	15,136		14,256		15,341
Operating expenses																	11,895	[6]	10,980		12,080	[6]
Interest expense																	1,121		1,038		1,035
Interest income																	78		86		79
Depreciation and amortization																	2,163		1,518		1,567
Equity in earnings of equity method investees																	25		13		55
Income tax expense (benefit)																	801	[11],[7]	692	[8]	529
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																	1,720	[6]	1,911	[7]	1,923	[6],[8]
Income (loss) from continuing operations																	1,908	[6]	1,911		1,923	[6],[8]
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES																	188	[9]	0		0
Capital expenditures, independent power and other investments and nuclear fuel purchases																	6,682		9,461		6,628
Property, plant and equipment	69,448								64,917								69,448		64,917		57,552
Accumulated depreciation and amortization	16,728								15,504								16,728		15,504		15,062
Total assets	69,306								64,439	[10]							69,306		64,439	[10]	57,188
Investment in equity method investees	422								262								422		262		202
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues																			10,114		10,613
Operating expenses																	7,906		7,757		8,537
Interest expense																	415		417		387
Interest income																	6		6		3
Depreciation and amortization																	1,159		659		798
Equity in earnings of equity method investees																	0		0		0
Income tax expense (benefit)																			752		654
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																			1,240		1,068
Capital expenditures, independent power and other investments and nuclear fuel purchases																	2,903		4,285		3,502
Property, plant and equipment	39,896								38,249								39,896		38,249		35,170
Accumulated depreciation and amortization	10,944								10,698								10,944		10,698		10,916
Total assets	36,488								34,853								36,488		34,853		31,816
Investment in equity method investees	0								0								0		0		0
NEER [Member]
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources (in hundredths)	70.00%																70.00%
Sale of natural gas-fired generating assets																					151
NEER [Member] | Fair Value, Measurements, Nonrecurring [Member]
Segment Reporting Information [Line Items]
Impairment charges																	300				51
Impairment charges, after-tax																	342				31
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues	2,541	[1],[2]	3,020	[1],[2]	2,696	[1],[2]	2,188	[1],[2]	2,336	[1],[2]	2,975	[1],[2]	2,580	[1],[2]	2,224	[1],[2]	10,445		10,114		10,613
Operating expenses																	7,906		7,757		8,537
Interest expense																	415		417		387
Depreciation and amortization																	1,159		659		798
Income tax expense (benefit)																	835		752		654
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																	2,184		1,992		1,722
Income (loss) from continuing operations	248	[1],[2]	422	[1],[2]	391	[1],[2]	288	[1],[2]	256	[1],[2]	392	[1],[2]	353	[1],[2]	239	[1],[2]	1,349		1,240		1,068
NET GAIN FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES																	0		0		0
Total assets	$ 36,488								$ 34,853								$ 36,488		$ 34,853

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

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

[5] Interest expense allocated from NEECH is based on a deemed capital structure of 70% debt. For this purpose, the deferred credit associated with differential membership interests sold by NEER subsidiaries is included with debt. Residual non-utility interest expense is included in Corporate and Other.

[6] NEER includes impairment charges of $300 million and other related charges ($342 million after-tax) in 2013 and impairment charges of $51 million ($31 million after-tax) in 2011. See Note 4 - Nonrecurring Fair Value Measurements.

[7] NEER includes PTCs that were recognized based on its tax sharing agreement with NEE. See Note 1 - Income Taxes.

[8] In 2011, NEER and Corporate and Other include an after-tax loss on sale of natural gas-fired generating assets of $92 million and $6 million, respectively. See Note 4 - Nonrecurring Fair Value Measurements.

[9] See Note 6.

[10] In 2012, NEER includes assets held for sale of approximately $335 million. See Note 6.

[11] In 2011, Corporate and Other includes state deferred income tax benefits of approximately $64 million, net of federal income taxes, related to state tax law changes and an income tax benefit of $41 million related to the dissolution of a subsidiary.