Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	$ (6)	$ 1	$ (4)
Net Interest Payable	2	9
FES
Net interest expense (income) and cumulative net interest payable (receivable)
Net Interest Expense (Income)	0	0	(4)
Net Interest Payable	$ 0	$ 1