Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010
Segment Reporting Information [Line Items]
Operating revenues	$ 4,382		$ 4,691		$ 11,476		$ 11,904
Operating expenses	3,471		3,566		9,230		9,131
Net income (loss)	407		720		1,256		1,694
Total assets	56,585		52,994		56,585		52,994		52,994
Deemed capital structure of NextEra Energy Resources	70.00%				70.00%
Loss on assets held for sale	148		0		148		0
Impairment charges	0		0		51		0
Deferred state tax benefit related to recent state tax law changes					64
Assets held for sale	1,092				1,092				0
FPL [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,152		3,116		8,200		8,024
Operating expenses	2,496		2,532		6,566		6,546
Net income (loss)	347		308		852		764
Total assets	30,870		28,698		30,870		28,698
NextEra Energy Resources [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,172	[1]	1,528	[1]	3,110	[1]	3,739	[1]
Operating expenses	920	[1]	997	[1]	2,520	[1],[2]	2,473	[1]
Net income (loss)	67	[1],[3]	386	[1]	371	[1],[3],[4]	907	[1]
Total assets	23,563	[5]	22,389		23,563	[5]	22,389
Loss on assets held for sale	91				91
Impairment charges					51
Impairment charge, after tax					31
Assets held for sale	1,100				1,100
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	58		47		166		141
Operating expenses	55		37		144		112
Net income (loss)	(7)	[6]	26	[7]	33	[6],[8]	23	[7]
Total assets	2,152		1,907		2,152		1,907
Loss on assets held for sale	6				6
One-time income tax benefit related to employee benefits			24				24
Deferred state tax benefit related to recent state tax law changes					$ 64

[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 - Nonrecurring Fair Value Measurements.

[3] Includes after-tax loss on assets held for sale of $91 million. See Note 3 - Nonrecurring Fair Value Measurements. See Note 5 for a discussion of NextEra Energy Resources' tax benefits related to PTCs.

[4] Includes after-tax impairment charges of approximately $31 million. See Note 3 - Nonrecurring Fair Value Measurements.

[5] Includes assets held for sale of approximately $1.1 billion. See Note 3 - Nonrecurring Fair Value Measurements.

[6] Includes after-tax loss on assets held for sale of $6 million. See Note 3 - Nonrecurring Fair Value Measurements.

[7] Includes an income tax benefit of $24 million related to employee benefits.

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