Summarized Financial Information of NEECH (Balance Sheet) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	$ 100,051	$ 92,083
Accumulated depreciation and amortization	(23,915)	(21,749)
Total property, plant and equipment - net	76,136	70,334
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	1,019	638
Receivables	3,121	2,969
Other	3,331	2,786
Total current assets	7,471	6,393
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	7,202	6,748
Goodwill	3,496	891
Other	16,247	19,336
Total other assets	26,945	26,975
TOTAL ASSETS	110,552	103,702
CAPITALIZATION
Common shareholders' equity	34,910	34,144
Noncontrolling interests	3,516	3,269
Redeemable noncontrolling interests	68	468
Long-term debt	33,947	26,782
Total capitalization	72,441	64,663
CURRENT LIABILITIES
Debt due within one year	7,770	10,930
Accounts payable	2,598	2,386
Other	4,044	4,247
Total current liabilities	14,412	17,563
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	3,383	3,135
Deferred income taxes	8,086	7,367
Other	12,230	10,974
Total other liabilities and deferred credits	23,699	21,476
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	110,552	103,702
Reportable Legal Entities [Member] | NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	354	220
Accumulated depreciation and amortization	(85)	(58)
Total property, plant and equipment - net	269	162
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	1	(1)
Receivables	161	292
Other	7	5
Total current assets	169	296
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	34,585	33,397
Investment in equity method investees	0	0
Goodwill	1	1
Other	511	937
Total other assets	35,097	34,335
TOTAL ASSETS	35,535	34,793
CAPITALIZATION
Common shareholders' equity	34,910	34,144
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	0	0
Total capitalization	34,910	34,144
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	2	32
Other	409	168
Total current liabilities	411	200
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	(406)	(157)
Other	620	606
Total other liabilities and deferred credits	214	449
TOTAL CAPITALIZATION AND LIABILITIES	35,535	34,793
Reportable Legal Entities [Member] | NEECH Non-Guarantor Subsidiaries [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	37,709	37,145
Accumulated depreciation and amortization	(8,874)	(8,473)
Total property, plant and equipment - net	28,835	28,672
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	913	525
Receivables	1,641	1,771
Other	1,783	1,425
Total current assets	4,337	3,721
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	7,202	6,748
Goodwill	593	587
Other	6,543	5,890
Total other assets	14,338	13,225
TOTAL ASSETS	47,510	45,618
CAPITALIZATION
Common shareholders' equity	8,785	7,917
Noncontrolling interests	3,516	3,269
Redeemable noncontrolling interests	68	468
Long-term debt	19,478	15,094
Total capitalization	31,847	26,748
CURRENT LIABILITIES
Debt due within one year	6,657	9,579
Accounts payable	1,893	1,730
Other	1,613	2,364
Total current liabilities	10,163	13,673
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,018	988
Deferred income taxes	2,748	2,778
Other	1,734	1,431
Total other liabilities and deferred credits	5,500	5,197
TOTAL CAPITALIZATION AND LIABILITIES	47,510	45,618
Consolidation, Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	61,988	54,718
Accumulated depreciation and amortization	(14,956)	(13,218)
Total property, plant and equipment - net	47,032	41,500
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	105	114
Receivables	1,319	906
Other	1,541	1,356
Total current assets	2,965	2,376
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	(34,585)	(33,397)
Investment in equity method investees	0	0
Goodwill	2,902	303
Other	9,193	12,509
Total other assets	(22,490)	(20,585)
TOTAL ASSETS	27,507	23,291
CAPITALIZATION
Common shareholders' equity	(8,785)	(7,917)
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	14,469	11,688
Total capitalization	5,684	3,771
CURRENT LIABILITIES
Debt due within one year	1,113	1,351
Accounts payable	703	624
Other	2,022	1,715
Total current liabilities	3,838	3,690
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,365	2,147
Deferred income taxes	5,744	4,746
Other	9,876	8,937
Total other liabilities and deferred credits	17,985	15,830
TOTAL CAPITALIZATION AND LIABILITIES	$ 27,507	$ 23,291