Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Line Items]
Environmental remediation liabilities- discounted	$ 40.4	$ 28.1
Accrual for environmental loss contingencies- weighted-average discount rate	3.70%	3.60%
Environmental remediation liabilities- undiscounted	$ 74.5	$ 68.2
Rental expense	37.6	$ 31.2	$ 31.4
Discontinued operations
Commitments And Contingencies Disclosure [Line Items]
Rental expense			$ 11.8
Minimum
Commitments And Contingencies Disclosure [Line Items]
Potential revision on future environmental remediation costs before tax	10.0
Maximum
Commitments And Contingencies Disclosure [Line Items]
Potential revision on future environmental remediation costs before tax	35.0
2014 Sales Contract | Other expenses, net
Commitments And Contingencies Disclosure [Line Items]
Legal accrual	16.2
Guarantee From Previously Disposed Business | Other expenses, net
Commitments And Contingencies Disclosure [Line Items]
Legal accrual	$ 10.8