Summarized Financial Information of Capital Holdings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
FPL Group Capital ownership percentage	100.00%		100.00%
Condensed Consolidating Statements of Income
Operating revenues	$ 3,667	$ 3,961	$ 7,038	$ 7,094
Operating expenses	(2,645)	(3,054)	(5,172)	(5,759)
Interest expense	(270)	(256)	(536)	(510)
Equity in earnings of subsidiaries	0	0	0	0
Other income (deductions) - net	98	76	137	138
Income (loss) before income taxes	850	727	1,467	963
Income tax expense (benefit)	243	147	399	115
Net income (loss)	607	580	1,068	848
Comprehensive income of NextEra Energy	511	493	1,032	797
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	60,948		60,948		57,552
Less accumulated depreciation and amortization	(15,453)		(15,453)		(15,062)
Total property, plant and equipment - net	45,495		45,495		42,490
CURRENT ASSETS
Cash and cash equivalents	295	287	295	287
Receivables	2,008		2,008		1,802
Other	2,551		2,551		2,693
Total current assets	4,854		4,854		4,872
OTHER ASSETS
Investment in subsidiaries	0		0		0
Other	10,041		10,041		9,826
Total other assets	10,041		10,041		9,826
TOTAL ASSETS	60,390		60,390		57,188
CAPITALIZATION
Common shareholders' equity	15,788		15,788		14,943
Long-term debt	21,580		21,580		20,810
Total capitalization	37,368		37,368		35,753
CURRENT LIABILITIES
Debt due within one year	3,270		3,270		2,157
Accounts payable	1,134		1,134		1,191
Other	3,239		3,239		3,371
Total current liabilities	7,643		7,643		6,719
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,659		1,659		1,611
Accumulated deferred income taxes	5,987		5,987		5,681
Other	7,733		7,733		7,424
Total other liabilities and deferred credits	15,379		15,379		14,716
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	60,390		60,390		57,188
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			1,928	1,991
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(4,030)	(2,860)
Capital contribution to FPL			0	0
Cash grants under the Recovery Act			3	486
Other - net			6	15
Net cash used in investing activities			(4,021)	(2,359)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			2,330	1,453
Retirements of long-term debt			(646)	(991)
Proceeds from sale of differential membership interests			337	210
Net change in short-term debt			170	160
Proceeds from Issuance of Common Stock			372	33
Dividends on common stock			(500)	(459)
Cash Dividends Paid to Parent Company			0	0
Other - net			(33)	(53)
Other Financing Activities, Not Otherwise Separately Disclosed			(52)
Net cash provided by (used in) financing activities			2,011	353
Net increase (decrease) in cash and cash equivalents			(82)	(15)
Cash and cash equivalents at beginning of period			377	302
Cash and cash equivalents at end of period	295	287	295	287
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0	0	0	0
Operating expenses	(5)	(4)	(9)	(7)
Interest expense	(3)	(3)	(6)	(7)
Equity in earnings of subsidiaries	607	529	1,065	798
Other income (deductions) - net	2	(3)	2	(1)
Income (loss) before income taxes	601	519	1,052	783
Income tax expense (benefit)	(6)	(61)	(16)	(65)
Net income (loss)	607	580	1,068	848
Comprehensive income of NextEra Energy	511	493	1,032	797
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	31		31		31
Less accumulated depreciation and amortization	(5)		(5)		(3)
Total property, plant and equipment - net	26		26		28
CURRENT ASSETS
Cash and cash equivalents	1	0	1	0
Receivables	124		124		84
Other	5		5		5
Total current assets	130		130		90
OTHER ASSETS
Investment in subsidiaries	15,710		15,710		14,879
Other	813		813		513
Total other assets	16,523		16,523		15,392
TOTAL ASSETS	16,679		16,679		15,510
CAPITALIZATION
Common shareholders' equity	15,788		15,788		14,943
Long-term debt	0		0		0
Total capitalization	15,788		15,788		14,943
CURRENT LIABILITIES
Debt due within one year	0		0		0
Accounts payable	1		1		0
Other	385		385		250
Total current liabilities	386		386		250
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0		0		0
Accumulated deferred income taxes	74		74		68
Other	431		431		249
Total other liabilities and deferred credits	505		505		317
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	16,679		16,679		15,510
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			403	437
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			0	(16)
Capital contribution to FPL			(240)	0
Cash grants under the Recovery Act			0	0
Other - net			0	16
Net cash used in investing activities			(240)	0
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			0	0
Retirements of long-term debt			0	0
Proceeds from sale of differential membership interests			0	0
Net change in short-term debt			0	0
Proceeds from Issuance of Common Stock			372	33
Dividends on common stock			(500)	(459)
Cash Dividends Paid to Parent Company			0	0
Other - net			(35)	(11)
Net cash provided by (used in) financing activities			(163)	(437)
Net increase (decrease) in cash and cash equivalents			0	0
Cash and cash equivalents at beginning of period			1	0
Cash and cash equivalents at end of period	1	0	1	0
Capital Holdings Consolidated [Member]
Condensed Consolidating Statements of Income
Operating revenues	1,090	1,163	2,241	2,053
Operating expenses	(726)	(824)	(1,509)	(1,689)
Interest expense	(163)	(159)	(324)	(322)
Equity in earnings of subsidiaries	0	0	0	0
Other income (deductions) - net	87	72	118	125
Income (loss) before income taxes	288	252	526	167
Income tax expense (benefit)	34	24	53	(125)
Net income (loss)	254	228	473	292
Comprehensive income of NextEra Energy	151	140	442	235
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	24,039		24,039		22,351
Less accumulated depreciation and amortization	(4,594)		(4,594)		(4,143)
Total property, plant and equipment - net	19,445		19,445		18,208
CURRENT ASSETS
Cash and cash equivalents	269	246	269	246
Receivables	1,139		1,139		1,026
Other	1,131		1,131		1,075
Total current assets	2,539		2,539		2,440
OTHER ASSETS
Investment in subsidiaries	0		0		0
Other	5,030		5,030		4,849
Total other assets	5,030		5,030		4,849
TOTAL ASSETS	27,014		27,014		25,497
CAPITALIZATION
Common shareholders' equity	4,064		4,064		4,030
Long-term debt	13,924		13,924		13,327
Total capitalization	17,988		17,988		17,357
CURRENT LIABILITIES
Debt due within one year	2,281		2,281		1,778
Accounts payable	505		505		512
Other	1,497		1,497		1,520
Total current liabilities	4,283		4,283		3,810
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	484		484		466
Accumulated deferred income taxes	1,389		1,389		1,376
Other	2,870		2,870		2,488
Total other liabilities and deferred credits	4,743		4,743		4,330
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	27,014		27,014		25,497
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			667	627
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(1,767)	(1,262)
Capital contribution to FPL			0	0
Cash grants under the Recovery Act			3	301
Other - net			47	4
Net cash used in investing activities			(1,717)	(957)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			1,736	1,205
Retirements of long-term debt			(621)	(967)
Proceeds from sale of differential membership interests			337	210
Net change in short-term debt			(38)	(393)
Proceeds from Issuance of Common Stock			0	0
Dividends on common stock			0	0
Cash Dividends Paid to Parent Company			(407)	0
Other - net			(27)	239
Net cash provided by (used in) financing activities			980	294
Net increase (decrease) in cash and cash equivalents			(70)	(36)
Cash and cash equivalents at beginning of period			339	282
Cash and cash equivalents at end of period	269	246	269	246
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	2,577	2,798	4,797	5,041
Operating expenses	(1,914)	(2,226)	(3,654)	(4,063)
Interest expense	(104)	(94)	(206)	(181)
Equity in earnings of subsidiaries	(607)	(529)	(1,065)	(798)
Other income (deductions) - net	9	7	17	14
Income (loss) before income taxes	(39)	(44)	(111)	13
Income tax expense (benefit)	215	184	362	305
Net income (loss)	(254)	(228)	(473)	(292)
Comprehensive income of NextEra Energy	(151)	(140)	(442)	(235)
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	36,878		36,878		35,170
Less accumulated depreciation and amortization	(10,854)		(10,854)		(10,916)
Total property, plant and equipment - net	26,024		26,024		24,254
CURRENT ASSETS
Cash and cash equivalents	25	41	25	41
Receivables	745		745		692
Other	1,415		1,415		1,613
Total current assets	2,185		2,185		2,342
OTHER ASSETS
Investment in subsidiaries	(15,710)		(15,710)		(14,879)
Other	4,198		4,198		4,464
Total other assets	(11,512)		(11,512)		(10,415)
TOTAL ASSETS	16,697		16,697		16,181
CAPITALIZATION
Common shareholders' equity	(4,064)		(4,064)		(4,030)
Long-term debt	7,656		7,656		7,483
Total capitalization	3,592		3,592		3,453
CURRENT LIABILITIES
Debt due within one year	989		989		379
Accounts payable	628		628		679
Other	1,357		1,357		1,601
Total current liabilities	2,974		2,974		2,659
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,175		1,175		1,145
Accumulated deferred income taxes	4,524		4,524		4,237
Other	4,432		4,432		4,687
Total other liabilities and deferred credits	10,131		10,131		10,069
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	16,697		16,697		16,181
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			858	927
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(2,263)	(1,582)
Capital contribution to FPL			240	0
Cash grants under the Recovery Act			0	185
Other - net			(41)	(5)
Net cash used in investing activities			(2,064)	(1,402)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			594	248
Retirements of long-term debt			(25)	(24)
Proceeds from sale of differential membership interests			0	0
Net change in short-term debt			208	553
Proceeds from Issuance of Common Stock			0	0
Dividends on common stock			0	0
Cash Dividends Paid to Parent Company			407	0
Other - net			10	(281)
Net cash provided by (used in) financing activities			1,194	496
Net increase (decrease) in cash and cash equivalents			(12)	21
Cash and cash equivalents at beginning of period			37	20
Cash and cash equivalents at end of period	$ 25	$ 41	$ 25	$ 41