CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net income	$ 36.4	$ 80.3	$ 73.0
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment loss (Note 14)	31.1	0.0	0.0
Depreciation and amortization	36.1	33.3	32.0
Stock-based compensation	4.0	6.4	5.8
Deferred income tax provision	(1.9)	(0.2)	16.9
Pension settlement charge, net of plan payments (Note 8)	1.8	0.6	0.8
Loss on asset dispositions	0.3	0.2	0.1
Non-cash effects of changes in liabilities for uncertain income tax positions	0.1	(0.1)	(1.5)
Net cash used in changes in operating working capital, net of effect of acquisitions (Note 16)	(1.0)	(11.8)	(1.2)
Pension and other post-employment benefits	(12.3)	(8.0)	(10.9)
Other	(1.9)	(0.7)	0.8
NET CASH PROVIDED BY OPERATING ACTIVITIES	92.7	100.0	115.8
INVESTING ACTIVITIES
Capital expenditures	(38.1)	(42.7)	(68.5)
Proceeds from sale of property, plant and equipment (Note 14)	5.0	0.0	0.1
Asset acquisition	0.0	(8.0)	0.0
Sales (purchases) of marketable securities	0.1
Sales (purchases) of marketable securities		(0.6)	(0.1)
Acquisitions (Note 4)	0.0	(43.1)	0.0
Other	(1.3)	(0.6)	0.3
NET CASH USED IN INVESTING ACTIVITIES	(34.3)	(95.0)	(68.2)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt (Note 7)	272.8	323.7	243.0
Debt issuance costs (Note 7)	(1.8)	(0.3)	(0.1)
Repayments of long-term debt (Note 7)	(285.6)	(293.3)	(252.9)
Proceeds from exercise of stock options	0.6	0.4	0.4
Cash dividends paid	(27.8)	(25.1)	(22.4)
Shares purchased (Note 10)	(10.8)	(9.3)	(16.4)
Other	0.0	0.1	0.0
NET CASH USED IN FINANCING ACTIVITIES	(52.6)	(3.8)	(48.4)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(0.4)	0.2	(0.3)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	5.4	1.4	(1.1)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4.5	3.1	4.2
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 9.9	$ 4.5	$ 3.1