Summarized Financial Information of Capital Holdings (Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 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	$ 82,320	$ 80,330
Accumulated depreciation and amortization	(19,426)	(18,944)
Total property, plant and equipment - net	62,894	61,386
CURRENT ASSETS
Cash and cash equivalents	628	571	$ 469	$ 577
Receivables	2,267	2,265
Other	4,201	3,959
Total current assets	7,096	6,795
OTHER ASSETS
Investment in subsidiaries	0	0
Other	14,647	14,298
Total other assets	14,647	14,298
TOTAL ASSETS	84,637	82,479
CAPITALIZATION
Common shareholders' equity	22,912	22,574
Noncontrolling Interest	718	538
Long-term debt	27,791	26,681
Total capitalization	51,421	49,793
CURRENT LIABILITIES
Debt due within one year	4,617	3,006
Accounts payable	1,139	2,529
Other	4,831	4,572
Total current liabilities	10,587	10,107
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,509	2,469
Deferred income taxes	9,982	9,827
Other	10,138	10,283
Total other liabilities and deferred credits	$ 22,629	$ 22,579
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	$ 84,637	$ 82,479
NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	27	27
Accumulated depreciation and amortization	(16)	(16)
Total property, plant and equipment - net	11	11
CURRENT ASSETS
Cash and cash equivalents	2	0	0	0
Receivables	64	90
Other	4	4
Total current assets	70	94
OTHER ASSETS
Investment in subsidiaries	22,691	22,544
Other	908	823
Total other assets	23,599	23,367
TOTAL ASSETS	23,680	23,472
CAPITALIZATION
Common shareholders' equity	22,912	22,574
Noncontrolling Interest	0	0
Long-term debt	0	0
Total capitalization	22,912	22,574
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	0	4
Other	196	252
Total current liabilities	196	256
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	91	157
Other	481	485
Total other liabilities and deferred credits	572	642
TOTAL CAPITALIZATION AND LIABILITIES	23,680	23,472
Capital Holdings Consolidated [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	36,130	34,921
Accumulated depreciation and amortization	(7,383)	(7,067)
Total property, plant and equipment - net	28,747	27,854
CURRENT ASSETS
Cash and cash equivalents	593	546	441	562
Receivables	1,575	1,510
Other	2,731	2,443
Total current assets	4,899	4,499
OTHER ASSETS
Investment in subsidiaries	0	0
Other	8,033	7,790
Total other assets	8,033	7,790
TOTAL ASSETS	41,679	40,143
CAPITALIZATION
Common shareholders' equity	7,639	6,990
Noncontrolling Interest	718	538
Long-term debt	17,867	16,725
Total capitalization	26,224	24,253
CURRENT LIABILITIES
Debt due within one year	3,401	2,786
Accounts payable	651	1,919
Other	3,188	3,003
Total current liabilities	7,240	7,708
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	665	647
Deferred income taxes	2,385	2,396
Other	5,165	5,139
Total other liabilities and deferred credits	8,215	8,182
TOTAL CAPITALIZATION AND LIABILITIES	41,679	40,143
Other Consolidated Entity And Consolidation Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	46,163	45,382
Accumulated depreciation and amortization	(12,027)	(11,861)
Total property, plant and equipment - net	34,136	33,521
CURRENT ASSETS
Cash and cash equivalents	33	25	$ 28	$ 15
Receivables	628	665
Other	1,466	1,512
Total current assets	2,127	2,202
OTHER ASSETS
Investment in subsidiaries	(22,691)	(22,544)
Other	5,706	5,685
Total other assets	(16,985)	(16,859)
TOTAL ASSETS	19,278	18,864
CAPITALIZATION
Common shareholders' equity	(7,639)	(6,990)
Noncontrolling Interest	0	0
Long-term debt	9,924	9,956
Total capitalization	2,285	2,966
CURRENT LIABILITIES
Debt due within one year	1,216	220
Accounts payable	488	606
Other	1,447	1,317
Total current liabilities	3,151	2,143
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,844	1,822
Deferred income taxes	7,506	7,274
Other	4,492	4,659
Total other liabilities and deferred credits	13,842	13,755
TOTAL CAPITALIZATION AND LIABILITIES	$ 19,278	$ 18,864