Pension and Post-Retirement Benefit Plans (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.4	$ 1.2
Interest cost	1.8	3.5
Expected return on plan assets	(2.2)	(4.7)
Recognized actuarial loss	1.5	2.0
Net periodic benefit cost	$ 2.5	$ 2.0