Retirement and Other Postretirement Benefit Plans - Schedule of Net Periodic Benefit Costs of Defined Benefit Retirement Plans (Details) - Defined Benefit Retirement Plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
U.S.
Net periodic benefit costs of defined benefit retirement plans
Service cost	$ 0.3	$ 0.2	$ 0.9	$ 0.8
Interest cost	0.2	0.1	0.5	0.4
Net amortization and deferral		0.1		0.1
Net periodic benefit (credit) cost	$ 0.5	$ 0.4	$ 1.4	$ 1.3
Defined Benefit Plan, Tax Status [Extensible List]	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember
European
Net periodic benefit costs of defined benefit retirement plans
Service cost	$ 0.3	$ 0.3	$ 0.8	$ 0.8
Interest cost	1.1	1.2	3.3	3.4
Expected return on plan assets	(2.1)	(2.4)	(6.5)	(7.1)
Net amortization and deferral			0.2	0.2
Net periodic benefit (credit) cost	$ (0.7)	$ (0.9)	$ (2.2)	$ (2.7)