CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities:
Consolidated net income	$ 137.1	$ 111.6	$ 95.5
Gain from discontinued operations	0.0	0.0	2.1
Income from continuing operations	137.1	111.6	93.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	91.9	98.3	84.4
Loss on disposal of property, plant and equipment	1.9	0.1	0.5
Pension amortization and settlement loss	7.9	9.9	5.1
Deferred income taxes	(10.9)	(2.5)	(21.1)
Provision for bad debts	6.2	2.6	2.4
Stock-based compensation	6.3	11.2	5.9
Asset impairment charge	18.5	34.2	23.7
Other non-cash (income) items	(3.1)	(0.2)
Other non-cash expense items			7.5
Changes in operating assets and liabilities
Accounts receivable	(4.9)	36.6	5.2
Inventories	3.1	3.1	19.5
Pension plan funding	(10.5)	(10.4)	(7.6)
Accounts payable	(4.8)	(9.7)	16.0
Restructuring liabilities	(4.3)	(3.0)	14.6
Income taxes payable	5.4	(15.4)	51.0
Tax benefits related to stock incentive programs	0.3	0.4	3.7
Prepaid expenses and other	(15.0)	3.2	9.9
Net cash provided by continuing operations	225.1	270.0	314.1
Net cash used in discontinued operations	0.0	0.0	(3.3)
Net cash provided by operating activities	225.1	270.0	310.8
Investing Activities:
Acquisition of business, net of cash acquired	0.0	0.0	(1,802.3)
Purchases of property, plant and equipment	(62.4)	(86.0)	(81.8)
Proceeds from sale of assets	1.4	5.0	9.4
Purchases of short-term investments	(6.7)	(4.7)	(6.3)
Proceeds from sale of short-term investments	8.0	1.1	18.7
Other	(1.9)	0.0	(0.7)
Net cash used in investing activities	(61.6)	(84.6)	(1,863.0)
Financing Activities:
Proceeds from issuance of long-term debt	7.2	11.8	1,546.1
Debt issuance and settlement costs	0.0	0.0	(38.2)
Repayment of long-term debt	(193.2)	(191.8)	(175.0)
Net issuance (repayment) of short-term debt	(0.1)	1.3	0.1
Purchase of common shares for treasury	(2.6)	0.0	0.0
Proceeds from issuance of stock under option plan	5.5	2.5	3.4
Excess tax benefits related to stock incentive programs	0.3	0.5	0.7
Purchase of non-controlling interest share	0.0	0.0	(2.1)
Dividends paid to non-controlling interest	(4.9)	(1.1)	(3.3)
Cash dividends paid	(7.0)	(7.0)	(6.9)
Net cash provided by (used in) financing activities	(194.8)	(183.8)	1,324.8
Effect of exchange rate changes on cash and cash equivalents	(9.6)	(21.8)	(13.3)
Net decrease in cash and cash equivalents	(40.9)	(20.2)	(240.7)
Cash and cash equivalents at beginning of period	229.4	249.6	490.3
Cash and cash equivalents at end of period	$ 188.5	$ 229.4	$ 249.6