CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
OPERATING ACTIVITIES
Net income	$ 16.3	$ 13.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7.2	7.2
Stock-based compensation	1.9	1.4
Excess tax benefit from stock-based compensation (Note 7)	(0.5)	(1.9)
Deferred income tax provision	4.6	4.7
Non-cash effects of changes in liabilities for uncertain income tax	(0.2)
Increase in working capital	(25.5)	(6.8)
Pension and other postretirement benefits	0.8	(2.8)
Other	0.5	(0.2)
NET CASH PROVIDED BY OPERATING ACTIVITIES	5.1	14.8
INVESTING ACTIVITIES
Capital expenditures	(5.7)	(4.3)
Purchase of marketable securities	(0.1)	(0.1)
Other	(0.1)	(0.1)
NET CASH USED IN INVESTING ACTIVITIES	(5.9)	(4.5)
FINANCING ACTIVITIES
Repayments of long-term debt	(4.7)
Repayments of short-term debt		(6.8)
Shares purchased (Note 9)	(3.3)	(0.1)
Proceeds from exercise of stock options	0.2	2.6
Excess tax benefit from stockbased compensation (Note 7)	0.5	1.9
Cash dividends paid	(5.1)	(4.0)
NET CASH USED IN FINANCING ACTIVITIES	(12.4)	(6.4)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(0.6)	(0.1)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(13.8)	3.8
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	72.6	73.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	58.8	77.2
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during period for interest, net of interest expense capitalized	0.4	0.3
Cash paid during period for income taxes	3.9	1.2
Non-cash investing activities:
Liability for equipment acquired	$ 1.2	$ 0.9