CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities:
Consolidated net income	$ 111.6	$ 95.5	$ 83.4
Gain (loss) from discontinued operations	0.0	2.1	(5.8)
Income from continuing operations	111.6	93.4	89.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	98.3	84.4	47.3
Loss on disposal of property, plant and equipment	0.1	0.5	1.2
Pension amortization and settlement loss	9.9	5.1	11.8
Deferred income taxes	(2.5)	(21.1)	4.4
Provision for bad debts	2.6	2.4	0.6
Stock-based compensation	11.2	5.9	5.2
Asset impairment charge	34.2	23.7	0.0
Other non-cash items	(0.2)	7.5	0.5
Changes in operating assets and liabilities
Accounts receivable	36.6	5.2	(10.5)
Inventories	3.1	19.5	(6.5)
Pension plan funding	(10.4)	(7.6)	(11.4)
Accounts payable	(9.7)	16.0	(0.8)
Restructuring liabilities	(3.0)	14.6	(0.3)
Income taxes payable	(15.4)	51.0	(1.5)
Tax benefits related to stock incentive programs	0.4	3.7	0.5
Prepaid expenses and other	3.2	9.9	7.8
Net cash provided by continuing operations	270.0	314.1	137.5
Net cash used in discontinued operations	0.0	(3.3)	(2.7)
Net cash provided by operating activities	270.0	310.8	134.8
Investing Activities:
Acquisition of business, net of cash acquired	0.0	(1,802.3)	0.0
Purchases of property, plant and equipment	(86.0)	(81.8)	(43.8)
Proceeds from sale of assets	5.0	9.4	0.0
Purchases of short-term investments	(4.7)	(6.3)	(5.4)
Proceeds from sales of short-term investments	1.1	18.7	3.0
Other	0.0	(0.7)	0.0
Net cash used in investing activities	(84.6)	(1,863.0)	(46.2)
Financing Activities:
Proceeds from issuance of long-term debt	11.8	1,546.1	75.0
Debt issuance and settlement costs	0.0	(38.2)	0.0
Repayment of long-term debt	(191.8)	(175.0)	(77.3)
Net issuance (repayment) of short-term debt	1.3	0.1	(1.2)
Purchase of common shares for treasury	0.0	0.0	(51.8)
Proceeds from issuance of stock under option plan	2.5	3.4	12.1
Excess tax benefits related to stock incentive programs	0.5	0.7	2.3
Purchase of non-controlling interest share	0.0	(2.1)	0.0
Dividends paid to non-controlling interest	(1.1)	(3.3)	(2.4)
Cash dividends paid	(7.0)	(6.9)	(6.9)
Net cash provided by (used in) financing activities	(183.8)	1,324.8	(50.2)
Effect of exchange rate changes on cash and cash equivalents	(21.8)	(13.3)	(2.2)
Net increase (decrease) in cash and cash equivalents	(20.2)	(240.7)	36.2
Cash and cash equivalents at beginning of period	249.6	490.3	454.1
Cash and cash equivalents at end of period	$ 229.4	$ 249.6	$ 490.3