Derivative Instruments (Details 1)	Jun. 30, 2011 MWH
Power Contracts
Volume of First Energy's outstanding derivative transactions
Purchases	45,573,000
Sales	(59,549,000)
Net	(13,976,000)
FTRs
Volume of First Energy's outstanding derivative transactions
Purchases	53,656,000
Sales	0
Net	53,656,000
Interest Rate Swap
Volume of First Energy's outstanding derivative transactions
Purchases	200,000,000
Sales	(200,000,000)
Net	0
NUGs
Volume of First Energy's outstanding derivative transactions
Purchases	26,903,000
Sales	0
Net	26,903,000