Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost	$ 0	$ 0
Net loss (gain)	5.3	0.7
Total amounts recognized	5.3	0.7
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost	0.1	0.3
Net loss (gain)	6.1	3.6
Total amounts recognized	$ 6.2	$ 3.9