Retirement and Other Postretirement Benefit Plans - Schedule of Amounts Recognized on Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Defined Benefit Retirement Plans | U.S.
Amounts recognized on the balance sheet:
Accrued liabilities	$ 0.9	$ 0.9
Other non-current liabilities	17.8	17.2
Total accrued benefit	$ 18.7	$ 18.1
Defined Benefit Plan, Tax Status [Extensible List]	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember
Defined Benefit Retirement Plans | European
Amounts recognized on the balance sheet:
Noncurrent asset	$ 47.2	$ 42.6
Accrued liabilities	0.4	0.4
Other non-current liabilities	18.7	18.8
Total accrued benefit	19.1	19.2
Postretirement Health Care and Life Insurance Benefit Plans
Amounts recognized on the balance sheet:
Accrued liabilities	0.5	0.5
Other non-current liabilities	2.8	2.8
Total accrued benefit	$ 3.3	$ 3.3