Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Workers’ compensation and other claims	$ 89.4	$ 57.7
Post-employment benefits	7.6	10.9
Asset retirement and remediation obligations	19.1	12.6
Acquisition-related obligations	0.0	17.8
Noncurrent tax liabilities	9.2	9.1
Other	43.4	42.1
Other liabilities	$ 168.7	$ 150.2