Employee Benefit Plans (Schedule of Weighted Average Assumptions to Determine Net Costs) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.50%	3.70%	4.40%
Rate of compensation increase	6.00%	6.00%	5.90%
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.80%	4.00%	4.50%
Rate of compensation increase	3.50%	3.50%	3.50%