Consolidated Statements of Common Stockholders' Equity (USD $)	Total	Common Stock	Other Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	FES	FES Common Stock	FES Accumulated Other Comprehensive Income (Loss)	FES Retained Earnings (Accumulated Deficit)	OE	OE Common Stock	OE Accumulated Other Comprehensive Income (Loss)	OE Retained Earnings (Accumulated Deficit)	CEI	CEI Common Stock	CEI Accumulated Other Comprehensive Income (Loss)	CEI Retained Earnings (Accumulated Deficit)	TE	TE Common Stock	TE Other Paid-In Capital	TE Accumulated Other Comprehensive Income (Loss)	TE Retained Earnings (Accumulated Deficit)	JCP&L	JCP&L Common Stock	JCP&L Other Paid-In Capital	JCP&L Accumulated Other Comprehensive Income (Loss)	JCP&L Retained Earnings (Accumulated Deficit)	Met-Ed	Met-Ed Common Stock	Met-Ed Accumulated Other Comprehensive Income (Loss)	Met-Ed Retained Earnings (Accumulated Deficit)	Penelec	Penelec Common Stock	Penelec Other Paid-In Capital	Penelec Accumulated Other Comprehensive Income (Loss)	Penelec Retained Earnings (Accumulated Deficit)
Beginning Balance at Dec. 31, 2008		$ 31,000,000	$ 5,473,000,000	$ 403,000,000	$ 2,810,000,000		$ 1,541,000,000	$ 42,000,000	$ 1,261,000,000		$ 1,185,000,000	$ 79,000,000	$ 5,000,000		$ 855,070,000	$ 32,930,000	$ 686,109,000		$ 147,010,000	$ 160,718,000	$ 26,054,000	$ 117,875,000		$ 144,000,000	$ 2,645,000,000	$ 72,000,000	$ (72,000,000)		$ 1,196,172,000	$ 44,673,000	$ (190,182,000)		$ 88,552,000	$ 912,441,000	$ 64,533,000	$ (64,867,000)
Beginning Balance, Shares at Dec. 31, 2008		304,835,407					7				60				67,930,743				29,402,054					14,421,637					859,500				4,427,577
Earnings available to Parent	872,000,000				872,000,000									(30,471,000)			(30,471,000)	18,381,000				18,381,000
NET INCOME	856,000,000					498,000,000			498,000,000	119,000,000			119,000,000	(28,757,000)				18,402,000					158,000,000				158,000,000	53,537,000			53,537,000	50,798,000				50,798,000
Unrealized gain (loss) on derivative hedges, net of income taxes				27,000,000				11,000,000																						335,000					72,000
Change in unrealized gain on investments, net of income taxes				(43,000,000)				(28,000,000)				(5,000,000)									(9,425,000)														(2,000)
Pension and other postretirement benefits, net of income taxes (Note 3)				140,000,000				40,000,000				30,000,000				26,891,000					3,855,000					(14,000,000)				(2,503,000)					(5,659,000)
Stock options exercised			(3,000,000)
Restricted stock units			7,000,000												74,000					71,000									55,000					65,000
Stock-based compensation			1,000,000								5,000,000
Stock options exercised, restricted stock units and other adjustments							1,000,000
Acquisition adjustment of non-controlling interest (Note 8)			(30,000,000)
Consolidated tax benefit allocation							3,000,000								6,038,000					2,231,000					4,000,000				843,000					931,000
Cash dividends declared on common stock					(670,000,000)								(346,000,000)				(250,000,000)										(127,000,000)									(50,000,000)
Repurchase of common stock																								(8,000,000)	(142,000,000)
Repurchase of common stock, Shares																								(793,190)
Cash dividends as return of capital											(74,000,000)
Ending Balance at Dec. 31, 2009		31,000,000	5,448,000,000	527,000,000	3,012,000,000		1,545,000,000	65,000,000	1,759,000,000		1,116,000,000	104,000,000	(222,000,000)		861,182,000	59,821,000	405,638,000		147,010,000	163,020,000	20,484,000	136,256,000		136,000,000	2,507,000,000	58,000,000	(41,000,000)		1,197,070,000	42,505,000	(136,645,000)		88,552,000	913,437,000	58,944,000	(64,069,000)
Ending Balance, Shares at Dec. 31, 2009		304,835,407					7				60				67,930,743				29,402,054					13,628,447					859,500				4,427,577
Earnings available to Parent	742,000,000				742,000,000									76,038,000			76,038,000	36,244,000				36,244,000
NET INCOME	718,000,000					231,000,000			231,000,000	155,000,000			155,000,000	77,555,000				36,248,000					183,000,000				183,000,000	60,084,000			60,084,000	63,190,000				63,190,000
Unrealized gain (loss) on derivative hedges, net of income taxes	(54,000,000)			22,000,000		1,000,000		14,000,000		0				0				0					(1,000,000)					(1,000,000)		(187,000)		0			(40,000)
Change in unrealized gain on investments, net of income taxes	7,000,000			5,000,000		6,000,000		5,000,000		0				0				0			85,000		0					0				0
Pension and other postretirement benefits, net of income taxes (Note 3)	472,000,000			(129,000,000)		55,000,000		(22,000,000)		82,000,000		(22,000,000)		34,000,000		(25,710,000)		15,000,000			(5,483,000)		52,000,000			(7,000,000)		38,000,000		(4,894,000)		50,000,000			(8,522,000)
Stock options exercised			(2,000,000)
Restricted stock units			(3,000,000)												55,000					1,000									6,000					82,000
Stock-based compensation			1,000,000
Consolidated tax benefit allocation							22,000,000				2,000,000				2,135,000										2,000,000
Cash dividends declared on common stock					(670,000,000)								(45,000,000)				(100,000,000)					(130,000,000)					(165,000,000)				(30,000,000)					(90,000,000)
Cash dividends as return of capital											(205,000,000)
Ending Balance at Dec. 31, 2010	8,984,000,000	31,000,000	5,444,000,000	425,000,000	3,084,000,000	3,619,000,000	1,567,000,000	62,000,000	1,990,000,000	883,000,000	913,000,000	82,000,000	(112,000,000)	1,279,159,000	863,372,000	34,111,000	381,676,000	367,617,000	147,010,000	163,021,000	15,086,000	42,500,000	2,673,000,000	136,000,000	2,509,000,000	51,000,000	(23,000,000)	1,127,939,000	1,197,076,000	37,424,000	(106,561,000)	961,574,000	88,552,000	913,519,000	50,382,000	(90,879,000)
Ending Balance, Shares at Dec. 31, 2010	304,835,407	304,835,407				7	7			60	60			67,930,743	67,930,743			29,402,054	29,402,054				13,628,447	13,628,447				859,500	859,500			4,427,577	4,427,577
Earnings available to Parent	885,000,000													70,570,000			70,570,000	34,720,000				34,720,000
NET INCOME	869,000,000					(59,000,000)			(59,000,000)	128,000,000			128,000,000	71,863,000				34,727,000					144,000,000				144,000,000	67,889,000			67,889,000	63,073,000				63,073,000
Unrealized gain (loss) on derivative hedges, net of income taxes	(39,000,000)			15,000,000		8,000,000		7,000,000		0				0				0					(1,000,000)					0		196,000		0			38,000
Change in unrealized gain on investments, net of income taxes	19,000,000			12,000,000		16,000,000		10,000,000		0				0				3,000,000			2,896,000		0					0				0
Pension and other postretirement benefits, net of income taxes (Note 3)	446,000,000			(26,000,000)		52,000,000		(3,000,000)		54,000,000		(28,000,000)		27,000,000		(6,847,000)		12,000,000			(2,904,000)		40,000,000			(12,000,000)		28,000,000		(10,092,000)		37,000,000			(13,367,000)
Stock options exercised			5,000,000
Restricted stock units			(2,000,000)												(30,000)					(8,000)									(51,000)					(76,000)
Stock-based compensation			2,000,000
Allegheny merger		11,000,000	4,316,000,000
Allegheny merger, Shares		113,381,030
Consolidated tax benefit allocation							3,000,000				2,000,000				2,228,000										2,000,000				719,000
Cash dividends declared on common stock					(922,000,000)								(100,000,000)				(64,000,000)					(34,000,000)									(25,000,000)					(70,000,000)
Repurchase of common stock																													(150,000,000)
Repurchase of common stock, Shares																													(118,595)
Cash dividends as return of capital											(168,000,000)														(500,000,000)				(205,000,000)
Ending Balance at Dec. 31, 2011	$ 13,280,000,000	$ 42,000,000	$ 9,765,000,000	$ 426,000,000	$ 3,047,000,000	$ 3,577,000,000	$ 1,570,000,000	$ 76,000,000	$ 1,931,000,000	$ 717,000,000	$ 747,000,000	$ 54,000,000	$ (84,000,000)	$ 1,281,080,000	$ 865,570,000	$ 27,264,000	$ 388,246,000	$ 368,321,000	$ 147,010,000	$ 163,013,000	$ 15,078,000	$ 43,220,000	$ 2,307,000,000	$ 136,000,000	$ 2,011,000,000	$ 39,000,000	$ 121,000,000	$ 806,600,000	$ 842,744,000	$ 27,528,000	$ (63,672,000)	$ 941,242,000	$ 88,552,000	$ 913,443,000	$ 37,053,000	$ (97,806,000)
Ending Balance, Shares at Dec. 31, 2011	418,216,437	418,216,437				7	7			60	60			67,930,743	67,930,743			29,402,054	29,402,054				13,628,447	13,628,447				740,905	740,905			4,427,577	4,427,577