Summarized Financial Information of Capital Holdings (Balance Sheet) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
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	$ 83,740	$ 80,330
Accumulated depreciation and amortization	(19,583)	(18,944)
Total property, plant and equipment - net	64,157	61,386
CURRENT ASSETS
Cash and cash equivalents	730	571	$ 551	$ 577
Receivables	2,673	2,265
Other	3,109	3,959
Total current assets	6,512	6,795
OTHER ASSETS
Investment in subsidiaries	0	0
Other	14,751	14,298
Total other assets	14,751	14,298
TOTAL ASSETS	85,420	82,479
CAPITALIZATION
Common shareholders' equity	23,174	22,574
Noncontrolling Interest	708	538
Long-term debt	27,001	26,681
Total capitalization	50,883	49,793
CURRENT LIABILITIES
Debt due within one year	5,307	3,006
Accounts payable	1,774	2,529
Other	4,255	4,572
Total current liabilities	11,336	10,107
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,556	2,469
Deferred income taxes	10,121	9,827
Other	10,524	10,283
Total other liabilities and deferred credits	23,201	22,579
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	85,420	82,479
NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27	27
Accumulated depreciation and amortization	(17)	(16)
Total property, plant and equipment - net	10	11
CURRENT ASSETS
Cash and cash equivalents	0	0	0	0
Receivables	73	90
Other	4	4
Total current assets	77	94
OTHER ASSETS
Investment in subsidiaries	22,966	22,544
Other	869	823
Total other assets	23,835	23,367
TOTAL ASSETS	23,922	23,472
CAPITALIZATION
Common shareholders' equity	23,174	22,574
Noncontrolling Interest	0	0
Long-term debt	0	0
Total capitalization	23,174	22,574
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	1	4
Other	188	252
Total current liabilities	189	256
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	84	157
Other	475	485
Total other liabilities and deferred credits	559	642
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	23,922	23,472
Capital Holdings Consolidated [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	36,633	34,921
Accumulated depreciation and amortization	(7,399)	(7,067)
Total property, plant and equipment - net	29,234	27,854
CURRENT ASSETS
Cash and cash equivalents	714	546	504	562
Receivables	1,824	1,510
Other	1,839	2,443
Total current assets	4,377	4,499
OTHER ASSETS
Investment in subsidiaries	0	0
Other	8,102	7,790
Total other assets	8,102	7,790
TOTAL ASSETS	41,713	40,143
CAPITALIZATION
Common shareholders' equity	7,465	6,990
Noncontrolling Interest	708	538
Long-term debt	17,076	16,725
Total capitalization	25,249	24,253
CURRENT LIABILITIES
Debt due within one year	4,279	2,786
Accounts payable	1,118	1,919
Other	2,717	3,003
Total current liabilities	8,114	7,708
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	689	647
Deferred income taxes	2,304	2,396
Other	5,357	5,139
Total other liabilities and deferred credits	8,350	8,182
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	41,713	40,143
Other Consolidated Entity And Consolidation Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	47,080	45,382
Accumulated depreciation and amortization	(12,167)	(11,861)
Total property, plant and equipment - net	34,913	33,521
CURRENT ASSETS
Cash and cash equivalents	16	25	$ 47	$ 15
Receivables	776	665
Other	1,266	1,512
Total current assets	2,058	2,202
OTHER ASSETS
Investment in subsidiaries	(22,966)	(22,544)
Other	5,780	5,685
Total other assets	(17,186)	(16,859)
TOTAL ASSETS	19,785	18,864
CAPITALIZATION
Common shareholders' equity	(7,465)	(6,990)
Noncontrolling Interest	0	0
Long-term debt	9,925	9,956
Total capitalization	2,460	2,966
CURRENT LIABILITIES
Debt due within one year	1,028	220
Accounts payable	655	606
Other	1,350	1,317
Total current liabilities	3,033	2,143
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,867	1,822
Deferred income taxes	7,733	7,274
Other	4,692	4,659
Total other liabilities and deferred credits	14,292	13,755
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	$ 19,785	$ 18,864