Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 235.6	$ 143.0	$ 94.5
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	198.4	199.9	177.0
Deferred income taxes	26.4	(9.2)	(18.7)
Stock-based compensation	15.9	9.7	10.8
Pensions and other postretirement benefits, net of contributions	(25.6)	31.8	6.5
Loss (gain) on disposal of property, plant and equipment, net	4.2	(2.6)	(3.5)
Debt refinancing and redemption costs	0.8	0.0	9.2
Changes in operating assets and liabilities
Accounts receivable	(17.9)	(78.3)	(0.3)
Inventories	11.2	10.9	(42.5)
Accounts payable and accrued expenses	(2.1)	13.7	66.3
Deferred revenue	(26.8)	24.5	(5.6)
Other assets and liabilities	(42.5)	(25.0)	(70.7)
Net cash provided by operating activities	377.6	318.4	223.0
Investing activities
Purchases of property, plant and equipment	(193.5)	(206.5)	(251.9)
Proceeds from sale of property, plant and equipment	0.3	9.1	9.1
Proceeds from sale-leaseback of equipment	0.0	0.0	24.1
Proceeds from government grants	5.1	2.1	0.0
Net cash used in investing activities	(188.1)	(195.3)	(218.7)
Financing activities
Net short-term repayments under credit facilities	0.0	0.0	(29.9)
Proceeds from issuance of long-term debt and other	16.8	5.0	786.7
Payments of long-term debt, capital lease obligations and other	(157.0)	(27.0)	(652.0)
Debt issuance costs	0.0	(0.3)	(16.7)
Purchase of noncontrolling interest	(1.1)	0.0	0.0
Employee stock option exercises	0.8	1.2	1.1
Purchase of treasury stock	(3.1)	(0.3)	(0.4)
Net cash provided by (used in) financing activities	(143.6)	(21.4)	88.8
Effect of exchange rate changes on cash	(12.6)	(6.5)	(1.5)
Net increase in cash and cash equivalents	33.3	95.2	91.6
Cash and cash equivalents at beginning of year	249.2	154.0	62.4
Cash and cash equivalents at end of year	282.5	249.2	154.0
Supplemental cash flow information
Interest paid	93.8	91.1	123.2
Income taxes paid, net	$ 11.3	$ 11.3	$ 11.6