Supplemental Guarantor Information (Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES
Net cash (used) provided by operating activities	$ (4.0)	$ 5.8
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(22.3)	(12.4)
Proceeds from sale of assets	2.8	0.0
Business acquisition	(35.6)	(10.5)
Net cash used by investing activities	(55.1)	(22.9)
FINANCING ACTIVITIES
Intercompany account change	0.0	0.0
Proceeds from (payments on) revolving credit facility, net	74.6	(28.8)
Payments on term loans and other debt	(2.6)	(28.9)
Proceeds from term loans and other debt	2.2	0.0
Payments on capital lease facilities, net	(2.3)
Proceeds from capital leases, net		1.2
Issuance of 6.625% Senior Notes due 2027	0.0	350.0
Repurchase of 8.125% Senior Notes due 2021	0.0	(250.0)
Debt financing costs	0.0	(7.2)
Premium on early extinguishment of debt	0.0	(8.0)
Dividend paid to Parent	(4.0)	(5.0)
Net cash provided by financing activities	67.9	23.3
Effect of exchange rate changes on cash	(2.6)	3.0
Increase in cash and cash equivalents	6.2	9.2
Cash and cash equivalents at beginning of period	76.2	54.4
Cash and cash equivalents at end of period	$ 82.4	63.6
Senior Notes | Senior Notes 6.625% Due 2027
FINANCING ACTIVITIES
Stated interest rate	6.625%
Senior Notes | Senior Notes 8.125% Due 2021
FINANCING ACTIVITIES
Stated interest rate	8.125%
Reportable Legal Entities | Parent
OPERATING ACTIVITIES
Net cash (used) provided by operating activities	$ (34.7)	(28.2)
INVESTING ACTIVITIES
Purchases of property, plant and equipment	0.0	0.0
Proceeds from sale of assets	0.0
Business acquisition	0.0	0.0
Net cash used by investing activities	0.0	0.0
FINANCING ACTIVITIES
Intercompany account change	(35.9)	(0.6)
Proceeds from (payments on) revolving credit facility, net	74.6	(28.8)
Payments on term loans and other debt	0.0	(22.2)
Proceeds from term loans and other debt	0.0
Payments on capital lease facilities, net	0.0
Proceeds from capital leases, net		0.0
Issuance of 6.625% Senior Notes due 2027		350.0
Repurchase of 8.125% Senior Notes due 2021		(250.0)
Debt financing costs		(7.2)
Premium on early extinguishment of debt		(8.0)
Dividend paid to Parent	(4.0)	(5.0)
Net cash provided by financing activities	34.7	28.2
Effect of exchange rate changes on cash	0.0	0.0
Increase in cash and cash equivalents	0.0	0.0
Cash and cash equivalents at beginning of period	0.0	0.0
Cash and cash equivalents at end of period	0.0	0.0
Reportable Legal Entities | Combined Guarantor Subsidiaries
OPERATING ACTIVITIES
Net cash (used) provided by operating activities	7.6	24.1
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(9.2)	(9.5)
Proceeds from sale of assets	2.8
Business acquisition	(35.6)	(10.5)
Net cash used by investing activities	(42.0)	(20.0)
FINANCING ACTIVITIES
Intercompany account change	38.6	(2.1)
Proceeds from (payments on) revolving credit facility, net	0.0	0.0
Payments on term loans and other debt	(0.3)	(2.0)
Proceeds from term loans and other debt	0.1
Payments on capital lease facilities, net	(2.1)
Proceeds from capital leases, net		0.0
Issuance of 6.625% Senior Notes due 2027		0.0
Repurchase of 8.125% Senior Notes due 2021		0.0
Debt financing costs		0.0
Premium on early extinguishment of debt		0.0
Dividend paid to Parent	0.0	0.0
Net cash provided by financing activities	36.3	(4.1)
Effect of exchange rate changes on cash	0.0	0.0
Increase in cash and cash equivalents	1.9	0.0
Cash and cash equivalents at beginning of period	0.2	0.0
Cash and cash equivalents at end of period	2.1	0.0
Reportable Legal Entities | Combined Non-Guarantor Subsidiaries
OPERATING ACTIVITIES
Net cash (used) provided by operating activities	46.8	15.2
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(13.1)	(2.9)
Proceeds from sale of assets	0.0
Business acquisition	0.0	0.0
Net cash used by investing activities	(13.1)	(2.9)
FINANCING ACTIVITIES
Intercompany account change	(26.4)	(2.6)
Proceeds from (payments on) revolving credit facility, net	0.0	0.0
Payments on term loans and other debt	(2.3)	(4.7)
Proceeds from term loans and other debt	2.1
Payments on capital lease facilities, net	(0.2)
Proceeds from capital leases, net		1.2
Issuance of 6.625% Senior Notes due 2027		0.0
Repurchase of 8.125% Senior Notes due 2021		0.0
Debt financing costs		0.0
Premium on early extinguishment of debt		0.0
Dividend paid to Parent	0.0	0.0
Net cash provided by financing activities	(26.8)	(6.1)
Effect of exchange rate changes on cash	(2.6)	3.0
Increase in cash and cash equivalents	4.3	9.2
Cash and cash equivalents at beginning of period	76.0	54.4
Cash and cash equivalents at end of period	80.3	63.6
Reclassifications/ Eliminations
OPERATING ACTIVITIES
Net cash (used) provided by operating activities	(23.7)	(5.3)
INVESTING ACTIVITIES
Purchases of property, plant and equipment	0.0	0.0
Proceeds from sale of assets	0.0
Business acquisition	0.0	0.0
Net cash used by investing activities	0.0	0.0
FINANCING ACTIVITIES
Intercompany account change	23.7	5.3
Proceeds from (payments on) revolving credit facility, net	0.0	0.0
Payments on term loans and other debt	0.0	0.0
Proceeds from term loans and other debt	0.0
Payments on capital lease facilities, net	0.0
Proceeds from capital leases, net		0.0
Issuance of 6.625% Senior Notes due 2027		0.0
Repurchase of 8.125% Senior Notes due 2021		0.0
Debt financing costs		0.0
Premium on early extinguishment of debt		0.0
Dividend paid to Parent	0.0	0.0
Net cash provided by financing activities	23.7	5.3
Effect of exchange rate changes on cash	0.0	0.0
Increase in cash and cash equivalents	0.0	0.0
Cash and cash equivalents at beginning of period	0.0	0.0
Cash and cash equivalents at end of period	$ 0.0	$ 0.0