Supplemental Balance Sheet Information - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Supplemental Balance Sheet Information [Line Items]
Accounts receivable sold	$ 1.2
Proceeds from sale of accounts receivable	$ 1.1
Repurchase of accounts receivable, term	5 months
Repurchase of accounts receivable, interest rate	2.00%
Subsequent collection of accounts receivable sold		$ 0.8
Inventories		3.5	$ 4.1
Loss on abandonment of unused property, plant and equipment		1.6
Other Noncurrent Liabilities
Supplemental Balance Sheet Information [Line Items]
Pension liabilities		24.4	24.3
Other liabilities		5.3	$ 5.1
Equity securities | Other Noncurrent Assets
Supplemental Balance Sheet Information [Line Items]
Cost method investments		$ 4.0