Consolidated Statements of Common Stockholders' Equity (Ohio Edison Company) (USD $) In Millions, except Share data	Total	Common Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	OE	OE Common Stock	OE Accumulated Other Comprehensive Income (Loss)	OE Retained Earnings (Accumulated Deficit)
Beginning Balance at Dec. 31, 2009		$ 31	$ 527	$ 3,012		$ 1,116	$ 104	$ (222)
Beginning Balance, Shares at Dec. 31, 2009		304,835,407				60
NET INCOME	718				155			155
Pension and other postretirement benefits, net of income taxes			(129)				(22)
Consolidated tax benefit allocation						2
Cash dividends declared on common stock				(670)				(45)
Cash dividends as return of capital						(205)
Ending Balance at Dec. 31, 2010		31	425	3,084		913	82	(112)
Ending Balance, Shares at Dec. 31, 2010		304,835,407				60
NET INCOME	47				32
Ending Balance at Mar. 31, 2011
Beginning Balance at Dec. 31, 2010		31	425	3,084		913	82	(112)
Beginning Balance, Shares at Dec. 31, 2010		304,835,407				60
NET INCOME	869				128			128
Pension and other postretirement benefits, net of income taxes			(26)				(28)
Consolidated tax benefit allocation						2
Cash dividends declared on common stock				(922)				(100)
Cash dividends as return of capital						(168)
Ending Balance at Dec. 31, 2011	13,280	42	426	3,047	717	747	54	(84)
Ending Balance, Shares at Dec. 31, 2011	418,216,437	418,216,437			60	60
Beginning Balance at Sep. 30, 2011
NET INCOME	99				1
Ending Balance at Dec. 31, 2011	13,280	42			717
Ending Balance, Shares at Dec. 31, 2011	418,216,437	418,216,437			60
NET INCOME	306				31
Ending Balance at Mar. 31, 2012
Beginning Balance at Dec. 31, 2011	13,280	42	426	3,047	717	747	54	(84)
Beginning Balance, Shares at Dec. 31, 2011	418,216,437	418,216,437			60	60
NET INCOME	771				101			101
Pension and other postretirement benefits, net of income taxes			(39)				(9)
Consolidated tax benefit allocation						1
Cash dividends declared on common stock				(920)
Cash dividends as return of capital						(90)
Ending Balance at Dec. 31, 2012	13,084	42	385	2,888	720	658	45	17
Ending Balance, Shares at Dec. 31, 2012	418,216,437	418,216,437			60	60
Beginning Balance at Sep. 30, 2012
NET INCOME	(148)				(15)
Ending Balance at Dec. 31, 2012	$ 13,084	$ 42			$ 720
Ending Balance, Shares at Dec. 31, 2012	418,216,437	418,216,437			60