Guarantor Financial Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$ (68.3)	$ (53.6)
INVESTING ACTIVITIES
Capital expenditures	(15.1)	(6.4)
Acquisition of business, net of cash acquired	(2.2)	0.0
Intercompany note receivable, net	0.0	0.0
Other investing activities	0.2	0.0
Net cash used in investing activities	(17.1)	(6.4)
FINANCING ACTIVITIES
Revolving facility borrowings	178.5	88.0
Payments on revolving facility borrowings	(130.0)	(68.0)
Intercompany note payable, net	0.0	0.0
Proceeds from the issuance of common stock	0.0	1.2
Dividends paid to Parent	0.0
Treasury stock repurchases	(1.2)	(0.8)
Debt issuance costs	(0.2)	0.0
Net cash provided by financing activities	47.1	20.4
Effect of exchange rate on cash and cash equivalents	1.5	(0.3)
Net decrease in cash and cash equivalents	(36.8)	(39.9)
Cash and cash equivalents at beginning of year	47.3	52.0
Cash and cash equivalents at end of period	10.5	12.1
Supplemental non-cash disclosure:
Intercompany debt allocation		0.0
Eliminations
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	(35.0)	0.0
INVESTING ACTIVITIES
Capital expenditures	0.0	0.0
Acquisition of business, net of cash acquired	0.0
Intercompany note receivable, net	(30.0)	2.0
Other investing activities	0.0
Net cash used in investing activities	(30.0)	2.0
FINANCING ACTIVITIES
Revolving facility borrowings	0.0	0.0
Payments on revolving facility borrowings	0.0	0.0
Intercompany note payable, net	30.0	(2.0)
Proceeds from the issuance of common stock		0.0
Dividends paid to Parent	35.0
Treasury stock repurchases	0.0	0.0
Debt issuance costs	0.0
Net cash provided by financing activities	65.0	(2.0)
Effect of exchange rate on cash and cash equivalents	0.0	0.0
Net decrease in cash and cash equivalents	0.0	0.0
Cash and cash equivalents at beginning of year	0.0	0.0
Cash and cash equivalents at end of period	0.0	0.0
Supplemental non-cash disclosure:
Intercompany debt allocation		0.0
Parent
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	(41.8)	(30.7)
INVESTING ACTIVITIES
Capital expenditures	0.0	0.0
Acquisition of business, net of cash acquired	0.0
Intercompany note receivable, net	0.0	0.0
Other investing activities	0.0
Net cash used in investing activities	0.0	0.0
FINANCING ACTIVITIES
Revolving facility borrowings	178.5	88.0
Payments on revolving facility borrowings	(130.0)	(68.0)
Intercompany note payable, net	(30.0)	2.0
Proceeds from the issuance of common stock		1.2
Dividends paid to Parent	0.0
Treasury stock repurchases	(1.2)	(0.8)
Debt issuance costs	(0.2)
Net cash provided by financing activities	17.1	22.4
Effect of exchange rate on cash and cash equivalents	0.0	0.0
Net decrease in cash and cash equivalents	(24.7)	(8.3)
Cash and cash equivalents at beginning of year	24.9	8.3
Cash and cash equivalents at end of period	0.2	0.0
Supplemental non-cash disclosure:
Intercompany debt allocation		(376.0)
Guarantor Subsidiaries
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	15.1	(18.1)
INVESTING ACTIVITIES
Capital expenditures	(15.1)	(6.3)
Acquisition of business, net of cash acquired	(2.2)
Intercompany note receivable, net	0.0	0.0
Other investing activities	0.2
Net cash used in investing activities	(17.1)	(6.3)
FINANCING ACTIVITIES
Revolving facility borrowings	0.0	0.0
Payments on revolving facility borrowings	0.0	0.0
Intercompany note payable, net	0.0	0.0
Proceeds from the issuance of common stock		0.0
Dividends paid to Parent	0.0
Treasury stock repurchases	0.0	0.0
Debt issuance costs	0.0
Net cash provided by financing activities	0.0	0.0
Effect of exchange rate on cash and cash equivalents	0.0	0.0
Net decrease in cash and cash equivalents	(2.0)	(24.4)
Cash and cash equivalents at beginning of year	5.0	27.9
Cash and cash equivalents at end of period	3.0	3.5
Supplemental non-cash disclosure:
Intercompany debt allocation		376.0
Non-guarantor Subsidiaries
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	(6.6)	(4.8)
INVESTING ACTIVITIES
Capital expenditures	0.0	(0.1)
Acquisition of business, net of cash acquired	0.0
Intercompany note receivable, net	30.0	(2.0)
Other investing activities	0.0
Net cash used in investing activities	30.0	(2.1)
FINANCING ACTIVITIES
Revolving facility borrowings	0.0	0.0
Payments on revolving facility borrowings	0.0	0.0
Intercompany note payable, net	0.0	0.0
Proceeds from the issuance of common stock		0.0
Dividends paid to Parent	(35.0)
Treasury stock repurchases	0.0	0.0
Debt issuance costs	0.0
Net cash provided by financing activities	(35.0)	0.0
Effect of exchange rate on cash and cash equivalents	1.5	(0.3)
Net decrease in cash and cash equivalents	(10.1)	(7.2)
Cash and cash equivalents at beginning of year	17.4	15.8
Cash and cash equivalents at end of period	$ 7.3	8.6
Supplemental non-cash disclosure:
Intercompany debt allocation		$ 0.0