Consolidated Statements of Income (FirstEnergy Corp.) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
REVENUES:
Electric utilities	$ 9,637		$ 10,400		$ 9,820
Unregulated businesses	5,666		5,747		3,519
Total revenues	15,303	[1]	16,147	[1]	13,339	[1]
OPERATING EXPENSES:
Fuel	2,471		2,317		1,432
Purchased power	4,237		4,875		4,624
Other operating expenses	3,769		3,964		2,714
Pensions and OPEB mark-to-market adjustment	609		507		190
Provision for depreciation	1,124		1,066		750
Deferral of storm costs	(375)		(145)		(14)
Amortization of regulatory assets, net	307		474		736
General taxes	985		978		776
Impairment of long-lived assets	0		413		388
Total operating expenses	13,127		14,449		11,596
OPERATING INCOME (LOSS)	2,176		1,698		1,743
Gain on partial sale of Signal Peak	0		569		0
OTHER INCOME (EXPENSE):
Investment income	77		114		117
Interest expense	(1,001)		(1,008)		(845)
Capitalized interest	72		70		165
Total other income (expense)	(852)		(255)		(563)
INCOME BEFORE INCOME TAXES	1,324		1,443		1,180
INCOME TAXES (BENEFITS)	553		574		462
NET INCOME	771		869		718
Income (loss) attributable to noncontrolling interest	1		(16)		(24)
EARNINGS AVAILABLE TO FIRSTENERGY CORP.	$ 770		$ 885		$ 742
EARNINGS PER SHARE OF COMMON STOCK:
Basic, in dollars per share	$ 1.85		$ 2.22		$ 2.44
Diluted, in dollars per share	$ 1.84		$ 2.21		$ 2.42
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING:
Basic, in shares	418		399		304
Diluted, in shares	419		401		305

[1] Includes excise tax collections of $455 million, $486 million and $428 million in 2012, 2011 and 2010, respectively.