Retirement and Other Postretirement Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
U.S. Non-qualified Defined Benefit Retirement Plans
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans	$ 0.1		$ 0.1		$ 4.9
Expected employer contribution in full current year			0.5
European Defined Benefit Retirement Plans
Amounts recognized on the balance sheet:
Employer contribution to defined benefit retirement plans	$ 2.4	$ 1.3	2.7	$ 2.7	4.3
Expected employer contribution in next fiscal year			4.8
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	$ 0.2
Expected employer contribution in next fiscal year			$ 0.3