Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1.0	$ 1.0	$ 1.0	$ 2.0
Interest cost	3.0	3.0	5.0	6.0
Expected return on plan assets	(4.0)	(4.0)	(7.0)	(7.0)
Amortization of Prior Service Cost	0.0	0.0	0.0	0.0
Amortization of net loss	1.0	1.0	3.0	2.0
Net periodic pension cost	$ 1.0	$ 2.0	$ 2.0	$ 3.0