SEGMENT INFORMATION- Financial Data (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Financial Information
Revenues	[1]	$ 3,231	$ 2,989
Depreciation		361	340
Deferral of regulatory assets, net		(80)	(37)
Equity method investment earnings		56	12
Interest expense		263	275
Income taxes (benefits)		90	83
Earnings attributable to FE		292	288
Capital investments		649	539
Total assets		46,479		$ 46,108
Goodwill		5,618		5,618
External Customers
Segment Financial Information
Revenues		3,231	2,989
Internal Customers
Segment Financial Information
Revenues		0	0
Operating Segments | Regulated Distribution
Segment Financial Information
Revenues		2,826	2,589
Depreciation		251	235
Deferral of regulatory assets, net		(79)	(38)
Equity method investment earnings		0	0
Interest expense		146	129
Income taxes (benefits)		56	69
Earnings attributable to FE		236	265
Capital investments		334	336
Total assets		31,886		31,749
Goodwill		5,004		5,004
Operating Segments | Regulated Distribution | External Customers
Segment Financial Information
Revenues		2,769	2,532
Operating Segments | Regulated Distribution | Internal Customers
Segment Financial Information
Revenues		57	57
Operating Segments | Regulated Transmission
Segment Financial Information
Revenues		461	453
Depreciation		91	86
Deferral of regulatory assets, net		(1)	1
Equity method investment earnings		0	0
Interest expense		59	59
Income taxes (benefits)		40	41
Earnings attributable to FE		114	125
Capital investments		308	197
Total assets		13,981		13,835
Goodwill		614		614
Operating Segments | Regulated Transmission | External Customers
Segment Financial Information
Revenues		460	451
Operating Segments | Regulated Transmission | Internal Customers
Segment Financial Information
Revenues		1	2
Corporate/Other
Segment Financial Information
Revenues		(56)	(53)
Depreciation		2	2
Deferral of regulatory assets, net		0	0
Equity method investment earnings		56	12
Interest expense		75	89
Income taxes (benefits)		(6)	(27)
Earnings attributable to FE		(58)	(102)
Capital investments		7	6
Total assets		612		524
Goodwill		0		0
Corporate/Other | External Customers
Segment Financial Information
Revenues		2	6
Corporate/Other | Internal Customers
Segment Financial Information
Revenues		0	0
Reconciling Adjustments
Segment Financial Information
Depreciation		17	17
Deferral of regulatory assets, net		0	0
Equity method investment earnings		0	0
Interest expense		(17)	(2)
Income taxes (benefits)		0	0
Earnings attributable to FE		0	0
Capital investments		0	0
Total assets		0		0
Goodwill		0		$ 0
Reconciling Adjustments | External Customers
Segment Financial Information
Revenues		0	0
Reconciling Adjustments | Internal Customers
Segment Financial Information
Revenues		$ (58)	$ (59)

[1] Includes excise and gross receipts tax collections of $109 million and $103 million during the three months ended March 31, 2023 and 2022, respectively.