Benefit Plans (Actuarial Assumptions for Benefit Obligations) (Details)	Dec. 31, 2014	Dec. 31, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.85%	4.65%
Expected long term rate of return	7.50%	7.50%
Rate of compensation increases	3.92%	3.99%
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.50%	3.60%