Employee Benefit Plans (Schedule of Net Periodic Benefit Cost Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net (gain) loss to be amortized over next fiscal year	$ 0.2
Prior service cost to be amortized over next fiscal year	0.0
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1.3	$ 1.1	$ 1.2
Interest cost	1.8	1.8	1.6
Amortization of prior service cost	0.0	0.0	0.0
Amortization of net loss (gain)	0.2	0.0	0.5
Net priodic benefit cost	3.3	2.9	3.3
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.2	0.3	0.4
Interest cost	1.1	1.1	1.0
Amortization of prior service cost	0.4	0.4	0.1
Amortization of net loss (gain)	2.0	0.2	1.9
Net priodic benefit cost	$ 3.7	$ 2.0	$ 3.4