Short-Term Borrowings and Bank Lines of Credit (Details 2)	Dec. 31, 2011	Dec. 31, 2010
FE
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.00%	0.68%
FES
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.53%	0.60%
OE
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.00%	0.51%
CEI
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.00%	1.92%
JCP&L
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.51%	0.00%
Met-Ed
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.51%	0.51%
Penelec
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.51%	0.51%