Transactions With Affiliated Companies (Details) (FES, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investment Income:
Interest income from FE	$ 3	$ 2	$ 2
Interest Expense:
Interest expense to affiliates	3	4	10
Interest expense to FE	4	6	1
Electric sales to affiliates
REVENUES:
Revenues	861	652	515
Other
REVENUES:
Revenues	6	6	16
Purchased power from affiliates
EXPENSES:
Expenses	271	486	451
Fuel
EXPENSES:
Expenses	1	0	2
Support services
EXPENSES:
Expenses	$ 619	$ 619	$ 570