Other Balance Sheet Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Current Liabilities
Accrued compensation	$ 62.4	$ 60.7
Deferred Revenue, Current	40.6	19.5
Environmental contingencies	19.5	23.5
Pension liabilities included in other current liabilities	14.7	15.0
Accrued interest	13.3	16.5
Income taxes payable	11.3	12.2
Other accrued liabilities	81.7	70.4
Other Liabilities, Current	243.5	217.8
Other Liabilities, Noncurrent [Abstract]
Environmental contingencies	106.9	46.8
Noncurrent liability	98.8	32.7
Fair value of currency and interest rate contracts	32.6	22.7
Deferred revenue	29.2	14.9
Deferred income taxes	10.9	8.2
Asset Retirement Obligation	8.8	10.4
Postemployment liability	4.7	5.2
Other noncurrent liabilities	27.9	28.4
Other Liabilities, Noncurrent	$ 319.8	$ 169.3