Retirement and Other Postretirement Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Defined Benefit Retirement Plans | U.S.
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans	$ 0.1	$ 0.1				$ 0.2
Expected employer contribution in full current year	1.1			$ 1.1
Net amortization gain deferral	$ (0.1)		$ (0.1)	$ (0.2)	$ (0.2)
Defined Benefit Plan, Tax Status [Extensible List]	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember	us-gaap:NonqualifiedPlanMember
Defined Benefit Retirement Plans | European
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans	$ 0.7		$ 2.4	$ 2.0	$ 2.7	$ 6.3
Expected employer contribution in full current year	5.1			5.1
Net amortization gain deferral	(0.1)		(0.1)	(0.2)	$ (0.3)
Postretirement Health Care and Life Insurance Benefit Plans
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans	0.1		$ 0.1			$ 0.1
Expected employer contribution in full current year	0.5			0.5
Net amortization gain deferral	$ 0.3			$ 0.6