Separate Financial Information of Guarantor Subsidiaries Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities		$ 10.9	$ 26.0
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment		(25.4)	(7.7)
Proceeds from Sale of Property, Plant, and Equipment			0.1
Proceeds from Principal Payments Received on Long-Term Note Receivable		0.1	0.7
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		(8.9)	0.0
Purchase of Intangible Assets		(0.4)	(1.2)
Loan Payments from Parent		0.0
Loan (Payments) Borrowings from Subsidiaries			0.0
Net Cash Used in Investing Activities		(34.6)	(8.1)
FINANCING ACTIVITIES
Loan Borrowings (Payments) from Parent			0.0
Proceeds from Credit Facility Borrowings		25.0	0.0
Repayments of Debt		(25.9)	(18.1)
Change in Finance Lease Obligations		0.1	0.1
Loan Payments to Subsidiaries		0.0
Proceeds from Issuance of Common Stock		1.2	3.7
Purchase of Noncontrolling Owner Interest	$ 0.0	(0.5)	0.0
Dividends Paid		(8.0)	(7.6)
Net Cash (Used in) Provided by Financing Activities		(8.3)	(21.9)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		1.3	(0.6)
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(30.7)	(4.6)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		86.1	59.0
Cash, Cash Equivalents and Restricted Cash at End of Period	55.4	55.4	54.4
Eliminations
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities		0.0	0.0
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment		0.0	0.0
Proceeds from Sale of Property, Plant, and Equipment			0.0
Proceeds from Principal Payments Received on Long-Term Note Receivable		0.0	0.0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		0.0
Purchase of Intangible Assets		0.0	0.0
Loan Payments from Parent		0.4
Loan (Payments) Borrowings from Subsidiaries			1.5
Net Cash Used in Investing Activities		0.4	(1.5)
FINANCING ACTIVITIES
Loan Borrowings (Payments) from Parent			1.5
Proceeds from Credit Facility Borrowings		0.0
Repayments of Debt		0.0	0.0
Change in Finance Lease Obligations		0.0	0.0
Loan Payments to Subsidiaries		(0.4)
Proceeds from Issuance of Common Stock		0.0	0.0
Purchase of Noncontrolling Owner Interest		0.0
Dividends Paid		0.0	0.0
Net Cash (Used in) Provided by Financing Activities		(0.4)	1.5
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		0.0	0.0
Net Decrease in Cash, Cash Equivalents and Restricted Cash		0.0	0.0
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		0.0	0.0
Cash, Cash Equivalents and Restricted Cash at End of Period	0.0	0.0	0.0
Parent
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities		10.1	27.0
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment		(19.9)	(2.3)
Proceeds from Sale of Property, Plant, and Equipment			0.0
Proceeds from Principal Payments Received on Long-Term Note Receivable		0.0	0.0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		0.0
Purchase of Intangible Assets		0.0	(1.0)
Loan Payments from Parent		0.0
Loan (Payments) Borrowings from Subsidiaries			0.0
Net Cash Used in Investing Activities		(19.9)	(3.3)
FINANCING ACTIVITIES
Loan Borrowings (Payments) from Parent			(1.5)
Proceeds from Credit Facility Borrowings		25.0
Repayments of Debt		(21.8)	(18.0)
Change in Finance Lease Obligations		0.0	0.0
Loan Payments to Subsidiaries		0.4
Proceeds from Issuance of Common Stock		1.2	3.7
Purchase of Noncontrolling Owner Interest		0.0
Dividends Paid		(8.0)	(7.6)
Net Cash (Used in) Provided by Financing Activities		(3.2)	(23.4)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		(0.1)	0.1
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(13.1)	0.4
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		24.8	18.5
Cash, Cash Equivalents and Restricted Cash at End of Period	11.7	11.7	18.9
Guarantor Subsidiaries
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities		(0.5)	1.4
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment		(0.1)	0.0
Proceeds from Sale of Property, Plant, and Equipment			0.0
Proceeds from Principal Payments Received on Long-Term Note Receivable		0.0	0.0
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		0.0
Purchase of Intangible Assets		0.0	0.0
Loan Payments from Parent		0.0
Loan (Payments) Borrowings from Subsidiaries			0.0
Net Cash Used in Investing Activities		(0.1)	0.0
FINANCING ACTIVITIES
Loan Borrowings (Payments) from Parent			0.0
Proceeds from Credit Facility Borrowings		0.0
Repayments of Debt		0.0	0.0
Change in Finance Lease Obligations		0.0	0.0
Loan Payments to Subsidiaries		0.0
Proceeds from Issuance of Common Stock		0.0	0.0
Purchase of Noncontrolling Owner Interest		0.0
Dividends Paid		0.0	0.0
Net Cash (Used in) Provided by Financing Activities		0.0	0.0
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		0.0	0.0
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(0.6)	1.4
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		1.6	0.5
Cash, Cash Equivalents and Restricted Cash at End of Period	1.0	1.0	1.9
Non-Guarantor Subsidiaries
OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities		1.3	(2.4)
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment		(5.4)	(5.4)
Proceeds from Sale of Property, Plant, and Equipment			0.1
Proceeds from Principal Payments Received on Long-Term Note Receivable		0.1	0.7
Acquisition of Businesses, Net of Cash, Cash Equivalents and Restricted Cash Acquired		(8.9)
Purchase of Intangible Assets		(0.4)	(0.2)
Loan Payments from Parent		(0.4)
Loan (Payments) Borrowings from Subsidiaries			(1.5)
Net Cash Used in Investing Activities		(15.0)	(3.3)
FINANCING ACTIVITIES
Loan Borrowings (Payments) from Parent			0.0
Proceeds from Credit Facility Borrowings		0.0
Repayments of Debt		(4.1)	(0.1)
Change in Finance Lease Obligations		0.1	0.1
Loan Payments to Subsidiaries		0.0
Proceeds from Issuance of Common Stock		0.0	0.0
Purchase of Noncontrolling Owner Interest		(0.5)
Dividends Paid		0.0	0.0
Net Cash (Used in) Provided by Financing Activities		(4.7)	0.0
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		1.4	(0.7)
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(17.0)	(6.4)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period		59.7	40.0
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 42.7	$ 42.7	$ 33.6