Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Deferred, net-
Total provision for income taxes	$ 574,000,000	$ 462,000,000	$ 184,000,000
FE
Currently payable (receivable)-
Federal	(243,000,000)	(23,000,000)	(183,000,000)
State	19,000,000	35,000,000	44,000,000
Currently payable Total	(224,000,000)	12,000,000	(139,000,000)
Deferred, net-
Federal	785,000,000	432,000,000	296,000,000
State	24,000,000	27,000,000	36,000,000
Deferred Tax Total	809,000,000	459,000,000	332,000,000
Investment tax credit amortization	(11,000,000)	(9,000,000)	(9,000,000)
Total provision for income taxes	574,000,000	462,000,000	184,000,000
FES
Currently payable (receivable)-
Federal	(219,000,000)	(23,000,000)	87,000,000
State	9,000,000	(2,000,000)	8,000,000
Currently payable Total	(210,000,000)	(25,000,000)	95,000,000
Deferred, net-
Federal	206,000,000	142,000,000	169,000,000
State	(3,000,000)	12,000,000	21,000,000
Deferred Tax Total	203,000,000	154,000,000	190,000,000
Investment tax credit amortization	(4,000,000)	(4,000,000)	(4,000,000)
Total provision for income taxes	(11,000,000)	125,000,000	281,000,000
OE
Currently payable (receivable)-
Federal	13,000,000	37,000,000	21,000,000
State	(12,000,000)	(2,000,000)	4,000,000
Currently payable Total	1,000,000	35,000,000	25,000,000
Deferred, net-
Federal	65,000,000	41,000,000	36,000,000
State	13,000,000	3,000,000	3,000,000
Deferred Tax Total	78,000,000	44,000,000	39,000,000
Investment tax credit amortization	(1,000,000)	(1,000,000)	(2,000,000)
Total provision for income taxes	78,000,000	78,000,000	62,000,000
CEI
Currently payable (receivable)-
Federal	17,000,000	58,000,000	40,000,000
State	(7,000,000)	1,000,000	2,000,000
Currently payable Total	10,000,000	59,000,000	42,000,000
Deferred, net-
Federal	15,000,000	(19,000,000)	(62,000,000)
State	10,000,000	(4,000,000)	1,000,000
Deferred Tax Total	25,000,000	(23,000,000)	(61,000,000)
Investment tax credit amortization	(1,000,000)	(1,000,000)	(1,000,000)
Total provision for income taxes	33,852,000	35,127,000	(19,794,000)
TE
Currently payable (receivable)-
Federal	(15,000,000)	(8,000,000)	6,000,000
State	(6,000,000)	(2,000,000)	0
Currently payable Total	(21,000,000)	(10,000,000)	6,000,000
Deferred, net-
Federal	35,000,000	25,000,000	(3,000,000)
State	1,000,000	1,000,000	2,000,000
Deferred Tax Total	36,000,000	26,000,000	(1,000,000)
Investment tax credit amortization	0	0	0
Total provision for income taxes	14,605,000	15,756,000	5,347,000
JCP&L
Currently payable (receivable)-
Federal	19,000,000	80,000,000	40,000,000
State	7,000,000	36,000,000	26,000,000
Currently payable Total	26,000,000	116,000,000	66,000,000
Deferred, net-
Federal	71,000,000	30,000,000	38,000,000
State	20,000,000	1,000,000	1,000,000
Deferred Tax Total	91,000,000	31,000,000	39,000,000
Investment tax credit amortization	0	0	0
Total provision for income taxes	117,000,000	147,000,000	105,000,000
Met-Ed
Currently payable (receivable)-
Federal	26,000,000	1,000,000	(34,000,000)
State	7,000,000	12,000,000	(4,000,000)
Currently payable Total	33,000,000	13,000,000	(38,000,000)
Deferred, net-
Federal	14,000,000	37,000,000	60,000,000
State	(10,000,000)	(2,000,000)	7,000,000
Deferred Tax Total	4,000,000	35,000,000	67,000,000
Investment tax credit amortization	0	0	0
Total provision for income taxes	36,820,000	47,733,000	28,875,000
Penelec
Currently payable (receivable)-
Federal	(36,000,000)	(81,000,000)	(21,000,000)
State	(6,000,000)	(12,000,000)	4,000,000
Currently payable Total	(42,000,000)	(93,000,000)	(17,000,000)
Deferred, net-
Federal	75,000,000	122,000,000	55,000,000
State	(3,000,000)	18,000,000	2,000,000
Deferred Tax Total	72,000,000	140,000,000	57,000,000
Investment tax credit amortization	0	(1,000,000)	(1,000,000)
Total provision for income taxes	$ 30,098,000	$ 46,340,000	$ 38,508,000