Summarized Financial Information of NEECH (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	$ 103,743	$ 92,083
Accumulated depreciation and amortization	(24,748)	(21,749)
Total property, plant and equipment - net	78,995	70,334
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	1,131	638
Receivables	3,330	2,969
Other	3,218	2,786
Total current assets	7,679	6,393
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	7,180	6,748
Goodwill	4,129	891
Other	16,239	19,336
Total other assets	27,548	26,975
TOTAL ASSETS	114,222	103,702
CAPITALIZATION
Common shareholders' equity	36,592	34,144
Noncontrolling interests	3,582	3,269
Redeemable noncontrolling interests	66	468
Long-term debt	36,144	26,782
Total capitalization	76,384	64,663
CURRENT LIABILITIES
Debt due within one year	5,643	10,930
Accounts payable	2,838	2,386
Other	4,833	4,247
Total current liabilities	13,314	17,563
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	3,438	3,135
Deferred income taxes	8,109	7,367
Other	12,977	10,974
Total other liabilities and deferred credits	24,524	21,476
COMMITMENTS AND CONTINGENCIES
TOTAL CAPITALIZATION AND LIABILITIES	114,222	103,702
Reportable Legal Entities [Member] | NextEra Energy (Guarantor) [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	434	220
Accumulated depreciation and amortization	(98)	(58)
Total property, plant and equipment - net	336	162
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	1	(1)
Receivables	124	292
Other	7	5
Total current assets	132	296
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	36,255	33,397
Investment in equity method investees	0	0
Goodwill	1	1
Other	471	937
Total other assets	36,727	34,335
TOTAL ASSETS	37,195	34,793
CAPITALIZATION
Common shareholders' equity	36,592	34,144
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	0	0
Total capitalization	36,592	34,144
CURRENT LIABILITIES
Debt due within one year	0	0
Accounts payable	2	32
Other	348	168
Total current liabilities	350	200
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	0	0
Deferred income taxes	(432)	(157)
Other	685	606
Total other liabilities and deferred credits	253	449
TOTAL CAPITALIZATION AND LIABILITIES	37,195	34,793
Reportable Legal Entities [Member] | NEECH Non-Guarantor Subsidiaries [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	39,969	37,145
Accumulated depreciation and amortization	(9,346)	(8,473)
Total property, plant and equipment - net	30,623	28,672
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	988	525
Receivables	1,706	1,771
Other	1,648	1,425
Total current assets	4,342	3,721
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	0	0
Investment in equity method investees	7,179	6,748
Goodwill	1,220	587
Other	6,722	5,890
Total other assets	15,121	13,225
TOTAL ASSETS	50,086	45,618
CAPITALIZATION
Common shareholders' equity	10,845	7,917
Noncontrolling interests	3,582	3,269
Redeemable noncontrolling interests	66	468
Long-term debt	20,589	15,094
Total capitalization	35,082	26,748
CURRENT LIABILITIES
Debt due within one year	4,841	9,579
Accounts payable	2,067	1,730
Other	1,923	2,364
Total current liabilities	8,831	13,673
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	1,063	988
Deferred income taxes	2,756	2,778
Other	2,354	1,431
Total other liabilities and deferred credits	6,173	5,197
TOTAL CAPITALIZATION AND LIABILITIES	50,086	45,618
Consolidation, Eliminations [Member]
PROPERTY, PLANT AND EQUIPMENT
Electric plant in service and other property	63,340	54,718
Accumulated depreciation and amortization	(15,304)	(13,218)
Total property, plant and equipment - net	48,036	41,500
CURRENT ASSETS
Cash and Cash Equivalents, at Carrying Value	142	114
Receivables	1,500	906
Other	1,563	1,356
Total current assets	3,205	2,376
OTHER ASSETS
Investments in Wholly-Owned Subsidiaries	(36,255)	(33,397)
Investment in equity method investees	1	0
Goodwill	2,908	303
Other	9,046	12,509
Total other assets	(24,300)	(20,585)
TOTAL ASSETS	26,941	23,291
CAPITALIZATION
Common shareholders' equity	(10,845)	(7,917)
Noncontrolling interests	0	0
Redeemable noncontrolling interests	0	0
Long-term debt	15,555	11,688
Total capitalization	4,710	3,771
CURRENT LIABILITIES
Debt due within one year	802	1,351
Accounts payable	769	624
Other	2,562	1,715
Total current liabilities	4,133	3,690
OTHER LIABILITIES AND DEFERRED CREDITS
Asset retirement obligations	2,375	2,147
Deferred income taxes	5,785	4,746
Other	9,938	8,937
Total other liabilities and deferred credits	18,098	15,830
TOTAL CAPITALIZATION AND LIABILITIES	$ 26,941	$ 23,291