Benefit Plans (Actuarial Assumptions for Benefit Obligations) (Details)	Dec. 31, 2015	Dec. 31, 2014
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.15%	3.85%
Expected long term rate of return	7.50%	7.50%
Rate of compensation increases		3.92%
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.75%	2.50%