Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
FE
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	$ (5)	$ (10)	$ (49)
Net Interest Payable (Receivable)	11	3
FES
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	1	1	(1)
Net Interest Payable (Receivable)	4	2
OE
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	(2)	(3)	4
Net Interest Payable (Receivable)	1	1
CEI
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	(2)	(2)	3
Net Interest Payable (Receivable)	0	0
TE
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	(1)	(1)	0
Net Interest Payable (Receivable)	0	0
JCP&L
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	0	(2)	(4)
Net Interest Payable (Receivable)	0	0
Met-Ed
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	0	0	(2)
Net Interest Payable (Receivable)	0	0
Penelec
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	0	0	(1)
Net Interest Payable (Receivable)	$ 0	$ 0