Summarized Financial Information of Capital Holdings (Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 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	$ 74,678	$ 73,639
Less accumulated depreciation and amortization	(18,445)	(17,934)
Total property, plant and equipment - net	56,233	55,705
CURRENT ASSETS
Cash and cash equivalents	469	577	488	438
Receivables	2,027	2,159
Other	3,801	4,208
Total current assets	6,297	6,944
OTHER ASSETS
Investment in subsidiaries	0	0
Other	12,399	12,280
Total other assets	12,399	12,280
TOTAL ASSETS	74,929	74,929
CAPITALIZATION
Common shareholders' equity	20,235	19,916
Noncontrolling Interest	229	252
Long-term debt	24,264	24,367
Total capitalization	44,728	44,535
CURRENT LIABILITIES
Debt due within one year	5,202	4,657
Accounts payable	1,104	1,354
Other	3,080	3,652
Total current liabilities	9,386	9,663
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,016	1,986
Deferred income taxes	9,337	9,261
Other	9,462	9,484
Total other liabilities and deferred credits	20,815	20,731
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	74,929	74,929
NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27	27
Less accumulated depreciation and amortization	(13)	(12)
Total property, plant and equipment - net	14	15
CURRENT ASSETS
Cash and cash equivalents	0	0	5	0
Receivables	212	82
Other	125	19
Total current assets	337	101
OTHER ASSETS
Investment in subsidiaries	19,997	19,703
Other	660	736
Total other assets	20,657	20,439
TOTAL ASSETS	21,008	20,555
CAPITALIZATION
Common shareholders' equity	20,235	19,916
Noncontrolling Interest	0	0
Long-term debt	0	0
Total capitalization	20,235	19,916
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	0	0
Other	322	182
Total current liabilities	322	182
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	142	149
Other	309	308
Total other liabilities and deferred credits	451	457
TOTAL CAPITALIZATION AND LIABILITIES	21,008	20,555
Capital Holdings Consolidated [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	31,918	31,674
Less accumulated depreciation and amortization	(6,948)	(6,640)
Total property, plant and equipment - net	24,970	25,034
CURRENT ASSETS
Cash and cash equivalents	441	562	445	418
Receivables	1,489	1,378
Other	2,088	2,512
Total current assets	4,018	4,452
OTHER ASSETS
Investment in subsidiaries	0	0
Other	6,487	6,066
Total other assets	6,487	6,066
TOTAL ASSETS	35,475	35,552
CAPITALIZATION
Common shareholders' equity	5,941	6,552
Noncontrolling Interest	229	252
Long-term debt	14,882	14,954
Total capitalization	21,052	21,758
CURRENT LIABILITIES
Debt due within one year	4,720	3,455
Accounts payable	534	707
Other	1,575	2,075
Total current liabilities	6,829	6,237
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	642	631
Deferred income taxes	2,633	2,608
Other	4,319	4,318
Total other liabilities and deferred credits	7,594	7,557
TOTAL CAPITALIZATION AND LIABILITIES	35,475	35,552
Other Consolidated Entity And Consolidation Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	42,733	41,938
Less accumulated depreciation and amortization	(11,484)	(11,282)
Total property, plant and equipment - net	31,249	30,656
CURRENT ASSETS
Cash and cash equivalents	28	15	38	20
Receivables	326	699
Other	1,588	1,677
Total current assets	1,942	2,391
OTHER ASSETS
Investment in subsidiaries	(19,997)	(19,703)
Other	5,252	5,478
Total other assets	(14,745)	(14,225)
TOTAL ASSETS	18,446	18,822
CAPITALIZATION
Common shareholders' equity	(5,941)	(6,552)
Noncontrolling Interest	0	0
Long-term debt	9,382	9,413
Total capitalization	3,441	2,861
CURRENT LIABILITIES
Debt due within one year	482	1,202
Accounts payable	570	647
Other	1,183	1,395
Total current liabilities	2,235	3,244
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,374	1,355
Deferred income taxes	6,562	6,504
Other	4,834	4,858
Total other liabilities and deferred credits	12,770	12,717
TOTAL CAPITALIZATION AND LIABILITIES	$ 18,446	$ 18,822