Pension and Post-Retirement Benefit Plans (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.2	$ 1.4
Interest cost	3.5	3.1
Expected return on plan assets	(4.7)	(4.7)
Recognized actuarial loss	2.0	2.3
Net periodic benefit cost	$ 2.0	$ 2.1