Summarized Financial Information of Capital Holdings (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 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	$ 79,205	$ 73,639
Less accumulated depreciation and amortization	(19,370)	(17,934)
Total property, plant and equipment - net	59,835	55,705
CURRENT ASSETS
Cash and cash equivalents	1,181	577	$ 485	$ 438
Receivables	2,310	2,159
Other	3,166	4,208
Total current assets	6,657	6,944
OTHER ASSETS
Investment in subsidiaries	0	0
Other	13,471	12,280
Total other assets	13,471	12,280
TOTAL ASSETS	79,963	74,929
CAPITALIZATION
Common shareholders' equity	22,318	19,916
Noncontrolling Interest	508	252
Long-term debt	25,604	24,367
Total capitalization	48,430	44,535
CURRENT LIABILITIES
Debt due within one year	4,660	4,657
Accounts payable	1,870	1,354
Other	3,841	3,652
Total current liabilities	10,371	9,663
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,101	1,986
Deferred income taxes	9,567	9,261
Other	9,494	9,484
Total other liabilities and deferred credits	$ 21,162	$ 20,731
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	$ 79,963	$ 74,929
NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27	27
Less accumulated depreciation and amortization	(15)	(12)
Total property, plant and equipment - net	12	15
CURRENT ASSETS
Cash and cash equivalents	0	0	1	0
Receivables	455	82
Other	88	19
Total current assets	543	101
OTHER ASSETS
Investment in subsidiaries	22,108	19,703
Other	671	736
Total other assets	22,779	20,439
TOTAL ASSETS	23,334	20,555
CAPITALIZATION
Common shareholders' equity	22,318	19,916
Noncontrolling Interest	0	0
Long-term debt	0	0
Total capitalization	22,318	19,916
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	12	0
Other	594	182
Total current liabilities	606	182
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	79	149
Other	331	308
Total other liabilities and deferred credits	410	457
TOTAL CAPITALIZATION AND LIABILITIES	23,334	20,555
Capital Holdings Consolidated [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	34,924	31,674
Less accumulated depreciation and amortization	(7,622)	(6,640)
Total property, plant and equipment - net	27,302	25,034
CURRENT ASSETS
Cash and cash equivalents	1,149	562	455	418
Receivables	1,707	1,378
Other	1,525	2,512
Total current assets	4,381	4,452
OTHER ASSETS
Investment in subsidiaries	0	0
Other	6,827	6,066
Total other assets	6,827	6,066
TOTAL ASSETS	38,510	35,552
CAPITALIZATION
Common shareholders' equity	6,223	6,552
Noncontrolling Interest	508	252
Long-term debt	16,566	14,954
Total capitalization	23,297	21,758
CURRENT LIABILITIES
Debt due within one year	4,352	3,455
Accounts payable	1,192	707
Other	2,079	2,075
Total current liabilities	7,623	6,237
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	686	631
Deferred income taxes	2,638	2,608
Other	4,266	4,318
Total other liabilities and deferred credits	7,590	7,557
TOTAL CAPITALIZATION AND LIABILITIES	38,510	35,552
Other Consolidated Entity And Consolidation Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	44,254	41,938
Less accumulated depreciation and amortization	(11,733)	(11,282)
Total property, plant and equipment - net	32,521	30,656
CURRENT ASSETS
Cash and cash equivalents	32	15	$ 29	$ 20
Receivables	148	699
Other	1,553	1,677
Total current assets	1,733	2,391
OTHER ASSETS
Investment in subsidiaries	(22,108)	(19,703)
Other	5,973	5,478
Total other assets	(16,135)	(14,225)
TOTAL ASSETS	18,119	18,822
CAPITALIZATION
Common shareholders' equity	(6,223)	(6,552)
Noncontrolling Interest	0	0
Long-term debt	9,038	9,413
Total capitalization	2,815	2,861
CURRENT LIABILITIES
Debt due within one year	308	1,202
Accounts payable	666	647
Other	1,168	1,395
Total current liabilities	2,142	3,244
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,415	1,355
Deferred income taxes	6,850	6,504
Other	4,897	4,858
Total other liabilities and deferred credits	13,162	12,717
TOTAL CAPITALIZATION AND LIABILITIES	$ 18,119	$ 18,822