Segment Information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended			6 Months Ended				3 Months Ended			6 Months Ended				3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Jun. 30, 2011 FPL [Member]	Jun. 30, 2010 FPL [Member]	Jun. 30, 2011 FPL [Member]	Jun. 30, 2010 FPL [Member]	Dec. 31, 2010 FPL [Member]	Jun. 30, 2011 NextEra Energy Resources [Member]		Jun. 30, 2010 NextEra Energy Resources [Member]	Jun. 30, 2011 NextEra Energy Resources [Member]		Jun. 30, 2010 NextEra Energy Resources [Member]	Dec. 31, 2010 NextEra Energy Resources [Member]	Jun. 30, 2011 Corporate And Other [Member]		Jun. 30, 2010 Corporate And Other [Member]	Jun. 30, 2011 Corporate And Other [Member]		Jun. 30, 2010 Corporate And Other [Member]	Dec. 31, 2010 Corporate And Other [Member]	Jun. 30, 2011 Change in estimate of useful lives [Member]	Jun. 30, 2011 Change in estimate of useful lives [Member]	Dec. 31, 2011 Change in estimate of useful lives [Member]
Segment Information [Abstract]
Deemed capital structure of NextEra Energy Resources	70.00%		70.00%
Segment Reporting Information [Line Items]
Operating revenues	$ 3,961	$ 3,591	$ 7,094	$ 7,213		$ 2,801	$ 2,580	$ 5,047	$ 4,908		$ 1,105	[1]	$ 965	$ 1,938	[1]	$ 2,212		$ 55		$ 46	$ 109		$ 93
Operating expenses	3,054	2,882	5,759	5,565		2,230	2,079	4,069	4,014		776	[1],[2]	767	1,600	[1],[2]	1,478		48		36	90		73
Net income (loss)	580	417	848	973		301	265	506	456		239	[1],[3]	154	304	[1],[3]	521		40	[4]	(2)	38	[4]	(4)
Total assets	54,557		54,557		52,994	30,128		30,128		28,698	22,752			22,752			22,389	1,677			1,677			1,907
Impairment charges	51	0	51	0							51
Impairment charge, after tax											31
Deferred state tax benefit related to recent state tax law changes	64		64															64
Change in Accounting Estimate [Line Items]
Previous average useful lives of wind plants' equipment (in years)																										25Y
Increased average useful lives of wind plants' equipment (in years)																										30Y
Reduction in depreciation and amortization expense due to change in estimate																									19	37
Increase in net income due to change in estimate																									11	22
Increase in basic earnings per share due to change in estimate (in dollars per share)																									$ 0.03	$ 0.05
Increase in diluted earnings per share due to change in estimate (in dollars per share)																									$ 0.03	$ 0.05
Expected reduction in depreciation and amortization expense for the fiscal year due to change in estimate																											75
Expected increase in net income for the fiscal year due to change in estimate																											$ 44
Expected increase in basic earnings per share for the fiscal year due to change in estimate (in dollars per share)																											$ 0.11
Expected increase in diluted earnings per share for the fiscal year due to change in estimate (in dollars per share)																											$ 0.11

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

[2] Includes impairment charges of approximately $51 million. See Note 3.

[3] Includes after-tax impairment charge of approximately $31 million. See Note 3. See Note 5 for a discussion of NextEra Energy Resources' tax benefits related to PTCs.

[4] Includes state deferred income tax benefits, net of federal income taxes, of approximately $64 million, primarily related to recent state tax law changes. See Note 5.