Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
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)																	95.00%		95.00%		98.00%
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)	2.00%								1.00%								2.00%		1.00%
Operating revenues	$ 3,864	[1],[2]	$ 4,382	[1],[2]	$ 3,961	[1],[2]	$ 3,134	[1],[2]	$ 3,413	[1],[2]	$ 4,691	[1],[2]	$ 3,591	[1],[2]	$ 3,622	[1],[2]	$ 15,341		$ 15,317		$ 15,643
Operating expenses																	11,963		12,074		13,049
Interest expense																	1,035		979		849
Interest income																	79		91		78
Depreciation and amortization																	1,567		1,788		1,765
Equity in earnings of equity method investees																	55		58		52
Income tax expense (benefit)																	529		532		327
Net income (loss)	667	[1],[2]	407	[1],[2]	580	[1],[2]	268	[1],[2]	263	[1],[2]	720	[1],[2]	417	[1],[2]	556	[1],[2]	1,923		1,957		1,615
Capital expenditures, independent power and other investments and nuclear fuel purchases																	6,628		5,846		6,006
Property, plant and equipment	57,552								54,221								57,552		54,221
Accumulated depreciation and amortization	15,062								15,146								15,062		15,146
Total assets	57,188								52,994								57,188		52,994
Investments in equity method investees	0								0								0		0
Sale of natural gas-fired generating assets																	151		0		0
Impairment charges																	51		19		0
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues																	10,613		10,485		11,491
Operating expenses																	8,537		8,636		9,910
Interest expense																	387		361		318
Interest income																	3		0		1
Depreciation and amortization																	798		1,008		1,097
Equity in earnings of equity method investees																	0		0		0
Income tax expense (benefit)																	654		580		473
Net income (loss)																	1,068		945		831
Capital expenditures, independent power and other investments and nuclear fuel purchases																	3,502		2,706		2,717
Property, plant and equipment	35,170								32,423								35,170		32,423		30,982
Accumulated depreciation and amortization	10,916								10,871								10,916		10,871		10,578
Total assets	31,816								28,698								31,816		28,698		26,812
Investments in equity method investees	0								0								0		0		0
NextEra Energy Resources [Member]
Segment Reporting Information [Line Items]
Deemed capital structure of NextEra Energy Resources (in hundredths)	70.00%																70.00%
Operating revenues																	4,502	[3]	4,636	[3]	3,997	[3]
Operating expenses																	3,233	[3],[4]	3,286	[3]	3,024	[3]
Interest expense																	530	[3]	515	[3]	460	[3]
Interest income																	23	[3]	21	[3]	23	[3]
Depreciation and amortization																	736	[3]	759	[3]	651	[3]
Equity in earnings of equity method investees																	55	[3]	58	[3]	52	[3]
Income tax expense (benefit)																	(24)	[3],[5]	(11)	[3],[5]	(158)	[3],[5]
Net income (loss)																	774	[3],[4],[6]	980	[3]	759	[3]
Capital expenditures, independent power and other investments and nuclear fuel purchases																	2,774	[3]	3,072	[3]	3,235	[3]
Property, plant and equipment	21,482	[3]							21,304	[3]							21,482	[3]	21,304	[3]	18,844	[3]
Accumulated depreciation and amortization	3,914	[3]							4,073	[3]							3,914	[3]	4,073	[3]	3,341	[3]
Total assets	23,459	[3]							22,389	[3]							23,459	[3]	22,389	[3]	20,136	[3]
Investments in equity method investees	193	[3]							217	[3]							193	[3]	217	[3]	173	[3]
Sale of natural gas-fired generating assets																	92
Impairment charges																	51
Impairment charges, after-tax																	31
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenues																	226		196		155
Operating expenses																	193		152		115
Interest expense																	118		103		71
Interest income																	53		70		54
Depreciation and amortization																	33		21		17
Equity in earnings of equity method investees																	0		0		0
Income tax expense (benefit)																	(101)	[7]	(37)		12
Net income (loss)																	81	[6]	32		25
Capital expenditures, independent power and other investments and nuclear fuel purchases																	352		68		54
Property, plant and equipment	900								494								900		494		343
Accumulated depreciation and amortization	232								202								232		202		172
Total assets	1,913								1,907								1,913		1,907		1,510
Investments in equity method investees	9								10								9		10		10
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																	15,341		15,317		15,643
Operating expenses																	11,963	[4]	12,074		13,049
Interest expense																	1,035		979		849
Interest income																	79		91		78
Depreciation and amortization																	1,567		1,788		1,765
Equity in earnings of equity method investees																	55		58		52
Income tax expense (benefit)																	529	[5],[7]	532		327
Net income (loss)																	1,923	[4],[6]	1,957		1,615
Capital expenditures, independent power and other investments and nuclear fuel purchases																	6,628		5,846		6,006
Property, plant and equipment	57,552								54,221								57,552		54,221		50,169
Accumulated depreciation and amortization	15,062								15,146								15,062		15,146		14,091
Total assets	57,188								52,994								57,188		52,994		48,458
Investments in equity method investees	$ 202								$ 227								$ 202		$ 227		$ 183

[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] Interest expense allocated from NEECH to NEER 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.

[4] In 2011, NEER includes impairment charges of approximately $51 million ($31 million after-tax). See Note 4 - Nonrecurring Fair Value Measurements.

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

[6] 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.

[7] 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.