Summarized Financial Information of NEECH (Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	$ 98,158	$ 92,083
Accumulated depreciation and amortization	(23,364)	(21,749)
Total property, plant and equipment - net	74,794	70,334
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	972	638
Receivables	2,974	2,969
Other	4,276	2,786
Total current assets	8,222	6,393
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	6,735	6,748
Goodwill	3,488	891
Other	15,790	19,336
Total other assets	26,013	26,975
TOTAL ASSETS	109,029	103,702
CAPITALIZATION
Common shareholders' equity	34,226	34,144
Noncontrolling interests	3,614	3,269
Redeemable noncontrolling interests	71	468
Long-term debt	29,883	26,782
Total capitalization	67,794	64,663
CURRENT LIABILITIES
Debt due within one year	10,330	10,930
Accounts payable	2,398	2,386
Other	5,198	4,247
Total current liabilities	17,926	17,563
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	3,350	3,135
Deferred income taxes	8,050	7,367
Other	11,909	10,974
Total other liabilities and deferred credits	23,309	21,476
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	109,029	103,702
Reportable Legal Entities [Member] | NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	300	220
Accumulated depreciation and amortization	(71)	(58)
Total property, plant and equipment - net	229	162
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	1	(1)
Receivables	202	292
Other	5	5
Total current assets	208	296
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	33,850	33,397
Investment in equity method investees	0	0
Goodwill	1	1
Other	516	937
Total other assets	34,367	34,335
TOTAL ASSETS	34,804	34,793
CAPITALIZATION
Common shareholders' equity	34,226	34,144
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	0	0
Total capitalization	34,226	34,144
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	7	32
Other	318	168
Total current liabilities	325	200
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	(381)	(157)
Other	634	606
Total other liabilities and deferred credits	253	449
TOTAL CAPITALIZATION AND LIABILITIES	34,804	34,793
Reportable Legal Entities [Member] | NEECH Non-Guarantor Subsidiaries [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	36,804	37,145
Accumulated depreciation and amortization	(8,571)	(8,473)
Total property, plant and equipment - net	28,233	28,672
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	842	525
Receivables	1,638	1,771
Other	2,777	1,425
Total current assets	5,257	3,721
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	6,735	6,748
Goodwill	589	587
Other	5,931	5,890
Total other assets	13,255	13,225
TOTAL ASSETS	46,745	45,618
CAPITALIZATION
Common shareholders' equity	7,463	7,917
Noncontrolling interests	3,614	3,269
Redeemable noncontrolling interests	71	468
Long-term debt	16,199	15,094
Total capitalization	27,347	26,748
CURRENT LIABILITIES
Debt due within one year	9,878	9,579
Accounts payable	1,615	1,730
Other	2,822	2,364
Total current liabilities	14,315	13,673
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,007	988
Deferred income taxes	2,663	2,778
Other	1,413	1,431
Total other liabilities and deferred credits	5,083	5,197
TOTAL CAPITALIZATION AND LIABILITIES	46,745	45,618
Consolidation, Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	61,054	54,718
Accumulated depreciation and amortization	(14,722)	(13,218)
Total property, plant and equipment - net	46,332	41,500
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	129	114
Receivables	1,134	906
Other	1,494	1,356
Total current assets	2,757	2,376
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	(33,850)	(33,397)
Investment in equity method investees	0	0
Goodwill	2,898	303
Other	9,343	12,509
Total other assets	(21,609)	(20,585)
TOTAL ASSETS	27,480	23,291
CAPITALIZATION
Common shareholders' equity	(7,463)	(7,917)
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	13,684	11,688
Total capitalization	6,221	3,771
CURRENT LIABILITIES
Debt due within one year	452	1,351
Accounts payable	776	624
Other	2,058	1,715
Total current liabilities	3,286	3,690
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,343	2,147
Deferred income taxes	5,768	4,746
Other	9,862	8,937
Total other liabilities and deferred credits	17,973	15,830
TOTAL CAPITALIZATION AND LIABILITIES	$ 27,480	$ 23,291