Segment Information (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
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)																	91.00%		92.00%		93.00%
Maximum percentage of operating revenues from foreign sources (in hundredths)																	2.00%		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	$ 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
Interest income																	80		78		86
Depreciation and amortization																	2,551		2,163		1,518
Equity in losses (earnings) of equity method investees																	93		25		13
Income tax expense (benefit)																	1,176		777	[3]	692
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	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
Income (loss) from continuing operations																	2,465	[6]	1,677	[6],[7]	1,911	[6]
Gain from discontinued operations, net of income taxes																	0		231	[3],[8]	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
Capital expenditures, independent power and other investments and nuclear fuel purchases																	7,017		6,682		9,461
Property, plant and equipment	73,639								69,448								73,639		69,448		64,917
Accumulated depreciation and amortization	17,934								16,728								17,934		16,728		15,504
Total assets	74,929								69,306								74,929		69,306		64,439
Investment in equity method investees	663								422								663		422		262
Impairment charges																	11		300		0
FPL [Member]
Segment Reporting Information [Line Items]
Operating expenses																	8,593		7,906		7,757
Interest expense																	439		415		417
Interest income																	3		6		6
Equity in losses (earnings) of equity method investees																	0		0		0
Income (loss) from continuing operations																	1,517		1,349		1,240
Gain from discontinued operations, net of income taxes																	0		0		0
Capital expenditures, independent power and other investments and nuclear fuel purchases																	3,241		2,903		4,285
Property, plant and equipment	41,938								39,896								41,938		39,896		38,249
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	11,282								10,944								11,282		10,944		10,698
Total assets	39,307								36,488								39,307		36,488		34,853
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%
Operating revenues																	5,191	[9]	4,333	[9]	3,895	[9]
Operating expenses																	3,724	[9]	3,730	[10],[9]	3,024	[9]
Interest expense																	666	[9]	528	[9]	474	[9]
Interest income																	26	[9]	19	[9]	20	[9]
Depreciation and amortization																	1,051	[9]	949	[9]	818	[9]
Equity in losses (earnings) of equity method investees																	93	[9]	26	[9]	19	[9]
Income tax expense (benefit)																	282	[11],[9]	(42)	[11],[12],[3],[9]	(7)	[11],[9]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest																	989	[9]	340	[12],[3],[9]	687	[9]
Gain from discontinued operations, net of income taxes																	0	[9]	216	[3],[8],[9]	0	[9]
Net income (loss) attributable to parent																	985	[9]	556	[12],[9]	687	[9]
Capital expenditures, independent power and other investments and nuclear fuel purchases																	3,627	[9]	3,613	[9]	4,681	[9]
Property, plant and equipment	30,155	[9]							28,080	[9]							30,155	[9]	28,080	[9]	25,333	[9]
Accumulated depreciation and amortization	6,268	[9]							5,455	[9]							6,268	[9]	5,455	[9]	4,535	[9]
Total assets	32,919	[9]							30,154	[9]							32,919	[9]	30,154	[9]	27,139	[13],[9]
Investment in equity method investees	537	[9]							365	[9]							537	[9]	365	[9]	243	[9]
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues																	409		358		247
Operating expenses																	320		259		199
Interest expense																	156		178		147
Interest income																	51		53		60
Depreciation and amortization																	68		55		41
Equity in losses (earnings) of equity method investees																	0		(1)		(6)
Income tax expense (benefit)																	(16)		(16)	[3]	(53)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest																	(37)		(12)	[3]	(16)
Gain from discontinued operations, net of income taxes																	0		15	[3],[8]	0
Net income (loss) attributable to parent																	(37)		3		(16)
Capital expenditures, independent power and other investments and nuclear fuel purchases																	149		166		495
Property, plant and equipment	1,546								1,472								1,546		1,472		1,335
Accumulated depreciation and amortization	384								329								384		329		271
Total assets	2,703								2,664								2,703		2,664		2,447
Investment in equity method investees	126								57								126		57		19
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues	2,682	[1],[2]	3,315	[1],[2]	2,889	[1],[2]	2,535	[1],[2]	2,541	[1],[2]	3,020	[1],[2]	2,696	[1],[2]	2,188	[1],[2]	11,421		10,445		10,114
Operating expenses																	8,593		7,906		7,757
Interest expense																	439		415		417
Depreciation and amortization																	1,432		1,159		659
Income tax expense (benefit)																	910		835		752
Net income (loss) attributable to parent	286	[1],[2]	462	[1],[2]	423	[1],[2]	347	[1],[2]	248	[1],[2]	422	[1],[2]	391	[1],[2]	288	[1],[2]	1,517		1,349		1,240
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	11,282								10,944								11,282		10,944
Total assets	39,307								36,488								39,307		36,488
NEER [Member]
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources (in hundredths)	70.00%																70.00%
Assets held for sale																					335
NEER [Member] | Fair Value, Measurements, Nonrecurring [Member]
Segment Reporting Information [Line Items]
Impairment charges																			300
Impairment charges, after-tax																			$ 342

[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] Calculated as income from continuing operations less net income attributable to noncontrolling interests from NEE's consolidated statements of income.

[7] 2013 amounts were reclassified to conform to current year's presentation. See Note 4 - Nonrecurring Fair Value Measurements.

[8] See Note 6.

[9] 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 NEECH corporate interest expense is included in Corporate and Other.

[10] NEER includes an impairment charge of $300 million in 2013 related to the Spain solar projects. See Note 4 - Nonrecurring Fair Value Measurements

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

[12] NEER includes after-tax charges of $342 million in 2013 associated with the impairment of the Spain solar projects. See Note 4 - Nonrecurring Fair Value Measurements

[13] In 2012, NEER includes assets held for sale of approximately $335 million.