Defined Benefit Pension Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0.0	$ 0.0	$ 1.0	$ 1.0
Interest cost	2.0	2.0	5.0	7.0
Expected return on plan assets	(3.0)	(4.0)	(10.0)	(11.0)
Amortization of Prior Service Cost	0.0	1.0	0.0	1.0
Amortization of net loss	1.0	1.0	4.0	4.0
Net periodic pension cost	$ 1.0	$ 0.0	$ 2.0	$ 2.0