Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1.0	$ 1.0
Interest cost	3.0	4.0
Expected return on plan assets	(4.0)	(4.0)
Amortization of Prior Service Cost	0.0	0.0
Amortization of net loss	1.0	1.0
Net periodic pension cost	$ 1.0	$ 2.0