SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total revenues	[1]	$ 12,459	$ 11,132	$ 10,790
Total depreciation		1,375	1,302	1,274
Total amortization (deferral) of regulatory assets, net		(365)	269	(53)
Total DPA penalty		0	230	0
Total miscellaneous income (expense), net		415	486	430
Total interest expense		1,039	1,139	1,065
Income taxes (benefits)		1,000	320	126
Total net income (loss)		439	1,283	1,079
Total income attributable to noncontrolling interest		33	0	0
Total earnings attributable to FE		406	1,283	1,079
Total property additions		2,756	2,445	2,657
Assets		46,108	45,432
Goodwill		5,618	5,618
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total revenues		(210)	(197)	(203)
Total amortization (deferral) of regulatory assets, net		0	0	0
Total DPA penalty		0	230	0
Total miscellaneous income (expense), net		85	58	81
Total net income (loss)		(912)	(413)	(344)
Total earnings attributable to FE		(912)	(413)	(344)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total amortization (deferral) of regulatory assets, net		0	0	0
Total miscellaneous income (expense), net		(67)	(12)	(13)
Total net income (loss)		0	0	0
Total earnings attributable to FE		0	0	0
Utilities and Transmission Companies
Segment Reporting Information [Line Items]
Goodwill		5,004
Utilities and Transmission Companies | Operating Segments
Segment Reporting Information [Line Items]
Total revenues		10,801	9,711	9,363
Total depreciation		967	911	896
Total amortization (deferral) of regulatory assets, net		(362)	260	(64)
Total miscellaneous income (expense), net		361	399	332
Income taxes (benefits)		251	364	113
Total net income (loss)		957	1,288	959
Total earnings attributable to FE		957	1,288	959
Regulated Transmission | Operating Segments
Segment Reporting Information [Line Items]
Total revenues		1,868	1,618	1,630
Total depreciation		335	325	313
Total amortization (deferral) of regulatory assets, net		(3)	9	11
Total miscellaneous income (expense), net		36	41	30
Income taxes (benefits)		110	127	138
Total net income (loss)		394	408	464
Total income attributable to noncontrolling interest		33	0	0
Total earnings attributable to FE		361	408	464
Miscellaneous income (expense), net
Segment Reporting Information [Line Items]
Total revenues		12,459	11,132	10,790
Regulated Distribution
Segment Reporting Information [Line Items]
Total revenues		0	0	0
Regulated Distribution | Utilities and Transmission Companies | Operating Segments
Segment Reporting Information [Line Items]
Total revenues		232	201	195
Regulated Distribution | Regulated Transmission | Operating Segments
Segment Reporting Information [Line Items]
Total revenues		5	10	17
Operating Segments | Utilities and Transmission Companies
Segment Reporting Information [Line Items]
Total interest expense		526	522	501
Total property additions		1,513	1,395	1,514
Assets		31,749	30,812
Goodwill		5,004	5,004
Operating Segments | Regulated Transmission
Segment Reporting Information [Line Items]
Total interest expense		230	247	219
Total property additions		1,192	958	1,067
Assets		13,835	13,237
Goodwill		614	614
Operating Segments | Miscellaneous income (expense), net | Utilities and Transmission Companies
Segment Reporting Information [Line Items]
Total revenues		10,569	9,510	9,168
Operating Segments | Miscellaneous income (expense), net | Regulated Transmission
Segment Reporting Information [Line Items]
Total revenues		1,863	1,608	1,613
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total depreciation		7	3	4
Total interest expense		350	382	358
Income taxes (benefits)		639	(171)	(125)
Total property additions		51	92	76
Assets		524	1,383
Goodwill		0	0
Corporate, Non-Segment | Miscellaneous income (expense), net
Segment Reporting Information [Line Items]
Total revenues		27	14	9
Corporate, Non-Segment | Regulated Distribution
Segment Reporting Information [Line Items]
Total revenues		0	0	0
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total depreciation		66	63	61
Total interest expense		(67)	(12)	(13)
Total property additions		0	0	0
Assets		0	0
Goodwill		0	0
Segment Reconciling Items | Miscellaneous income (expense), net
Segment Reporting Information [Line Items]
Total revenues		0	0	0
Segment Reconciling Items | Regulated Distribution
Segment Reporting Information [Line Items]
Total revenues		(237)	(211)	(212)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Income taxes (benefits)		$ 0	$ 0	$ 0

[1] Includes excise and gross receipts tax collections of $406 million, $374 million and $362 million in 2022, 2021 and 2020, respectively.