Summarized Financial Information of Capital Holdings (Balance Sheet) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
NEECH a 100% owned subsidiary of NEE	100.00%
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	$ 77,264	$ 73,639
Less accumulated depreciation and amortization	(18,954)	(17,934)
Total property, plant and equipment - net	58,310	55,705
CURRENT ASSETS
Cash and cash equivalents	551	577	$ 622	$ 438
Receivables	2,139	2,159
Other	3,656	4,208
Total current assets	6,346	6,944
OTHER ASSETS
Investment in subsidiaries	0	0
Other	12,545	12,280
Total other assets	12,545	12,280
TOTAL ASSETS	77,201	74,929
CAPITALIZATION
Common shareholders' equity	21,338	19,916
Noncontrolling Interest	263	252
Long-term debt	25,235	24,367
Total capitalization	46,836	44,535
CURRENT LIABILITIES
Debt due within one year	4,539	4,657
Accounts payable	1,517	1,354
Other	3,365	3,652
Total current liabilities	9,421	9,663
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,051	1,986
Deferred income taxes	9,436	9,261
Other	9,457	9,484
Total other liabilities and deferred credits	$ 20,944	$ 20,731
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	$ 77,201	$ 74,929
NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	28	27
Less accumulated depreciation and amortization	(14)	(12)
Total property, plant and equipment - net	14	15
CURRENT ASSETS
Cash and cash equivalents	0	0	19	0
Receivables	429	82
Other	93	19
Total current assets	522	101
OTHER ASSETS
Investment in subsidiaries	21,105	19,703
Other	659	736
Total other assets	21,764	20,439
TOTAL ASSETS	22,300	20,555
CAPITALIZATION
Common shareholders' equity	21,338	19,916
Noncontrolling Interest	0	0
Long-term debt	0	0
Total capitalization	21,338	19,916
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	0	0
Other	518	182
Total current liabilities	518	182
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	141	149
Other	303	308
Total other liabilities and deferred credits	444	457
TOTAL CAPITALIZATION AND LIABILITIES	22,300	20,555
Capital Holdings Consolidated [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	33,759	31,674
Less accumulated depreciation and amortization	(7,298)	(6,640)
Total property, plant and equipment - net	26,461	25,034
CURRENT ASSETS
Cash and cash equivalents	504	562	545	418
Receivables	1,594	1,378
Other	1,966	2,512
Total current assets	4,064	4,452
OTHER ASSETS
Investment in subsidiaries	0	0
Other	6,679	6,066
Total other assets	6,679	6,066
TOTAL ASSETS	37,204	35,552
CAPITALIZATION
Common shareholders' equity	6,604	6,552
Noncontrolling Interest	263	252
Long-term debt	15,768	14,954
Total capitalization	22,635	21,758
CURRENT LIABILITIES
Debt due within one year	4,284	3,455
Accounts payable	789	707
Other	1,840	2,075
Total current liabilities	6,913	6,237
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	660	631
Deferred income taxes	2,700	2,608
Other	4,296	4,318
Total other liabilities and deferred credits	7,656	7,557
TOTAL CAPITALIZATION AND LIABILITIES	37,204	35,552
Other Consolidated Entity And Consolidation Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	43,477	41,938
Less accumulated depreciation and amortization	(11,642)	(11,282)
Total property, plant and equipment - net	31,835	30,656
CURRENT ASSETS
Cash and cash equivalents	47	15	$ 58	$ 20
Receivables	116	699
Other	1,597	1,677
Total current assets	1,760	2,391
OTHER ASSETS
Investment in subsidiaries	(21,105)	(19,703)
Other	5,207	5,478
Total other assets	(15,898)	(14,225)
TOTAL ASSETS	17,697	18,822
CAPITALIZATION
Common shareholders' equity	(6,604)	(6,552)
Noncontrolling Interest	0	0
Long-term debt	9,467	9,413
Total capitalization	2,863	2,861
CURRENT LIABILITIES
Debt due within one year	255	1,202
Accounts payable	728	647
Other	1,007	1,395
Total current liabilities	1,990	3,244
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,391	1,355
Deferred income taxes	6,595	6,504
Other	4,858	4,858
Total other liabilities and deferred credits	12,844	12,717
TOTAL CAPITALIZATION AND LIABILITIES	$ 17,697	$ 18,822