Summarized Financial Information of Capital Holdings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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	$ 3,843	$ 4,382	$ 10,881	$ 11,476
Operating expenses	(3,094)	(3,471)	(8,266)	(9,230)
Interest expense	(259)	(265)	(795)	(775)
Equity in earnings of subsidiaries	0	0	0	0
Other income (deductions) - net	79	(81)	215	58
Income (loss) before income taxes	569	565	2,035	1,529
Income tax expense (benefit)	154	158	553	273
Net income (loss)	415	407	1,482	1,256
Comprehensive income (loss) of NextEra Energy	386	178	1,417	976
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	63,430		63,430		57,552
Less accumulated depreciation and amortization	(15,737)		(15,737)		(15,062)
Total property, plant and equipment - net	47,693		47,693		42,490
CURRENT ASSETS
Cash and cash equivalents	246	640	246	640
Receivables	2,122		2,122		1,802
Other	2,069		2,069		2,693
Total current assets	4,437		4,437		4,872
OTHER ASSETS
Investment in subsidiaries	0		0		0
Other	9,919		9,919		9,826
Total other assets	9,919		9,919		9,826
TOTAL ASSETS	62,049		62,049		57,188
CAPITALIZATION
Common shareholders' equity	15,886		15,886		14,943
Long-term debt	22,714		22,714		20,810
Total capitalization	38,600		38,600		35,753
CURRENT LIABILITIES
Debt due within one year	3,636		3,636		2,157
Accounts payable	1,194		1,194		1,191
Other	3,045		3,045		3,371
Total current liabilities	7,875		7,875		6,719
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,685		1,685		1,611
Accumulated deferred income taxes	6,166		6,166		5,681
Other	7,723		7,723		7,424
Total other liabilities and deferred credits	15,574		15,574		14,716
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	62,049		62,049		57,188
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			3,157	3,117
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(6,689)	(4,317)
Capital contribution to FPL			0	0
Cash grants under the Recovery Act			105	503
Change in loan proceeds restricted for construction			212	(596)
Other - net			(129)	(12)
Net cash used in investing activities			(6,501)	(4,422)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			4,226	2,917
Retirements of long-term debt			(1,321)	(1,688)
Proceeds from sale of differential membership interests			414	210
Net change in short-term debt			396	946
Proceeds from Issuance of Common Stock			386	39
Dividends on common stock			(752)	(689)
Other - net			(64)	(92)
Other Financing Activities, Not Otherwise Separately Disclosed			(136)
Net cash provided by (used in) financing activities			3,213	1,643
Net increase (decrease) in cash and cash equivalents			(131)	338
Cash and cash equivalents at beginning of period			377	302
Cash and cash equivalents at end of period	246	640	246	640
NextEra Energy (Guarantor) [Member]
Condensed Consolidating Statements of Income
Operating revenues	0	0	0	0
Operating expenses	(5)	(4)	(13)	(11)
Interest expense	(2)	(3)	(8)	(10)
Equity in earnings of subsidiaries	416	416	1,480	1,214
Other income (deductions) - net	4	1	5	1
Income (loss) before income taxes	413	410	1,464	1,194
Income tax expense (benefit)	(2)	3	(18)	(62)
Net income (loss)	415	407	1,482	1,256
Comprehensive income (loss) of NextEra Energy	386	178	1,417	976
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	31		31		31
Less accumulated depreciation and amortization	(6)		(6)		(3)
Total property, plant and equipment - net	25		25		28
CURRENT ASSETS
Cash and cash equivalents	1	0	1	0
Receivables	112		112		84
Other	5		5		5
Total current assets	118		118		90
OTHER ASSETS
Investment in subsidiaries	15,858		15,858		14,879
Other	745		745		513
Total other assets	16,603		16,603		15,392
TOTAL ASSETS	16,746		16,746		15,510
CAPITALIZATION
Common shareholders' equity	15,886		15,886		14,943
Long-term debt	0		0		0
Total capitalization	15,886		15,886		14,943
CURRENT LIABILITIES
Debt due within one year	0		0		0
Accounts payable	0		0		0
Other	289		289		250
Total current liabilities	289		289		250
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0		0		0
Accumulated deferred income taxes	67		67		68
Other	504		504		249
Total other liabilities and deferred credits	571		571		317
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	16,746		16,746		15,510
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			662	979
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			0	(16)
Capital contribution to FPL			(240)	(310)
Cash grants under the Recovery Act			0	0
Change in loan proceeds restricted for construction			0	0
Other - net			0	16
Net cash used in investing activities			(240)	(310)
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			386	39
Dividends on common stock			(752)	(689)
Other - net			(56)	(19)
Net cash provided by (used in) financing activities			(422)	(669)
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	871	1,232	3,112	3,285
Operating expenses	(836)	(973)	(2,346)	(2,662)
Interest expense	(155)	(164)	(479)	(486)
Equity in earnings of subsidiaries	0	0	0	0
Other income (deductions) - net	61	(86)	180	40
Income (loss) before income taxes	(59)	9	467	177
Income tax expense (benefit)	(82)	(60)	(29)	(185)
Net income (loss)	23	69	496	362
Comprehensive income (loss) of NextEra Energy	(6)	(160)	437	76
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	25,778		25,778		22,351
Less accumulated depreciation and amortization	(4,817)		(4,817)		(4,143)
Total property, plant and equipment - net	20,961		20,961		18,208
CURRENT ASSETS
Cash and cash equivalents	226	610	226	610
Receivables	1,090		1,090		1,026
Other	1,003		1,003		1,075
Total current assets	2,319		2,319		2,440
OTHER ASSETS
Investment in subsidiaries	0		0		0
Other	4,783		4,783		4,849
Total other assets	4,783		4,783		4,849
TOTAL ASSETS	28,063		28,063		25,497
CAPITALIZATION
Common shareholders' equity	3,784		3,784		4,030
Long-term debt	15,082		15,082		13,327
Total capitalization	18,866		18,866		17,357
CURRENT LIABILITIES
Debt due within one year	2,712		2,712		1,778
Accounts payable	522		522		512
Other	1,410		1,410		1,520
Total current liabilities	4,644		4,644		3,810
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	495		495		466
Accumulated deferred income taxes	1,273		1,273		1,376
Other	2,785		2,785		2,488
Total other liabilities and deferred credits	4,553		4,553		4,330
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	28,063		28,063		25,497
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			878	1,071
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(3,492)	(1,950)
Capital contribution to FPL			0	0
Cash grants under the Recovery Act			105	301
Change in loan proceeds restricted for construction			212	(596)
Other - net			(59)	4
Net cash used in investing activities			(3,234)	(2,241)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			3,632	2,669
Retirements of long-term debt			(1,272)	(1,643)
Proceeds from sale of differential membership interests			414	210
Net change in short-term debt			254	639
Proceeds from Issuance of Common Stock			0	0
Dividends on common stock			0	0
Other - net			(785)	(377)
Net cash provided by (used in) financing activities			2,243	1,498
Net increase (decrease) in cash and cash equivalents			(113)	328
Cash and cash equivalents at beginning of period			339	282
Cash and cash equivalents at end of period	226	610	226	610
Other Consolidated Entity And Consolidation Eliminations [Member]
Condensed Consolidating Statements of Income
Operating revenues	2,972	3,150	7,769	8,191
Operating expenses	(2,253)	(2,494)	(5,907)	(6,557)
Interest expense	(102)	(98)	(308)	(279)
Equity in earnings of subsidiaries	(416)	(416)	(1,480)	(1,214)
Other income (deductions) - net	14	4	30	17
Income (loss) before income taxes	215	146	104	158
Income tax expense (benefit)	238	215	600	520
Net income (loss)	(23)	(69)	(496)	(362)
Comprehensive income (loss) of NextEra Energy	6	160	(437)	(76)
PROPERTY, PLANT AND EQUIPMENT
Electric utility plant in service and other property	37,621		37,621		35,170
Less accumulated depreciation and amortization	(10,914)		(10,914)		(10,916)
Total property, plant and equipment - net	26,707		26,707		24,254
CURRENT ASSETS
Cash and cash equivalents	19	30	19	30
Receivables	920		920		692
Other	1,061		1,061		1,613
Total current assets	2,000		2,000		2,342
OTHER ASSETS
Investment in subsidiaries	(15,858)		(15,858)		(14,879)
Other	4,391		4,391		4,464
Total other assets	(11,467)		(11,467)		(10,415)
TOTAL ASSETS	17,240		17,240		16,181
CAPITALIZATION
Common shareholders' equity	(3,784)		(3,784)		(4,030)
Long-term debt	7,632		7,632		7,483
Total capitalization	3,848		3,848		3,453
CURRENT LIABILITIES
Debt due within one year	924		924		379
Accounts payable	672		672		679
Other	1,346		1,346		1,601
Total current liabilities	2,942		2,942		2,659
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,190		1,190		1,145
Accumulated deferred income taxes	4,826		4,826		4,237
Other	4,434		4,434		4,687
Total other liabilities and deferred credits	10,450		10,450		10,069
Commitments and Contingencies
TOTAL CAPITALIZATION AND LIABILITIES	17,240		17,240		16,181
Condensed Consolidating Statements of Cash Flows
NET CASH PROVIDED BY OPERATING ACTIVITIES			1,617	1,067
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures, independent power and other investments and nuclear fuel purchases			(3,197)	(2,351)
Capital contribution to FPL			240	310
Cash grants under the Recovery Act			0	202
Change in loan proceeds restricted for construction			0	0
Other - net			(70)	(32)
Net cash used in investing activities			(3,027)	(1,871)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt			594	248
Retirements of long-term debt			(49)	(45)
Proceeds from sale of differential membership interests			0	0
Net change in short-term debt			142	307
Proceeds from Issuance of Common Stock			0	0
Dividends on common stock			0	0
Other - net			705	304
Net cash provided by (used in) financing activities			1,392	814
Net increase (decrease) in cash and cash equivalents			(18)	10
Cash and cash equivalents at beginning of period			37	20
Cash and cash equivalents at end of period	$ 19	$ 30	$ 19	$ 30