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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating Activities: |  |  |
Consolidated net income | $ 199.0 | $ 137.1 | $ 111.6
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, depletion and amortization | 91.0 | 91.9 | 98.3
Loss on disposal of property, plant and equipment | 1.8 | 1.9 | 0.1
Deferred income taxes | (76.1) | (10.9) | (2.5)
Pension amortization and settlement loss | 7.4 | 7.9 | 9.9
Provision for bad debts | 3.8 | 6.2 | 2.6
Stock-based compensation | 8.1 | 6.3 | 11.2
Asset impairment charge | 5.3 | 18.5 | 34.2
Non-cash debt modification costs | 1.8 | 0.0 | 0.0
Other non-cash items | (1.7) | (3.1) | (0.2)
Changes in operating assets and liabilities |  |  |
Accounts receivable | (27.3) | (4.9) | 36.6
Inventories | (25.2) | 3.1 | 3.1
Pension plan funding | (10.8) | (10.5) | (10.4)
Accounts payable | 28.0 | (4.8) | (9.7)
Restructuring liabilities | 4.5 | (4.3) | (3.0)
Income taxes payable | (12.6) | 5.4 | (15.4)
Prepaid expenses and other | 10.6 | (14.7) | 3.6
Net cash provided by operating activities | 207.6 | 225.1 | 270.0
Investing Activities: |  |  |
Purchases of property, plant and equipment | (76.7) | (62.4) | (86.0)
Proceeds from sale of assets | 1.4 | 1.4 | 5.0
Purchases of short-term investments | 3.8 | (6.7) | (4.7)
Proceeds from sale of short-term investments | (4.5) | 8.0 | 1.1
Other | (1.5) | (1.9) | 0.0
Net cash used in investing activities | (77.5) | (61.6) | (84.6)
Financing Activities: |  |  |
Proceeds from issuance of long-term debt | 0.0 | 7.2 | 11.8
Repayment of long-term debt | (118.9) | (193.2) | (191.8)
Net issuance (repayment) of short-term debt | (0.2) | (0.1) | 1.3
Purchase of common shares for treasury | (0.7) | (2.6) | 0.0
Proceeds from issuance of stock under option plan | 14.6 | 5.5 | 2.5
Excess tax benefits related to stock incentive programs | (3.6) | 0.3 | 0.5
Dividends paid to non-controlling interest | (2.4) | (4.9) | (1.1)
Cash dividends paid | (7.0) | (7.0) | (7.0)
Net cash used in financing activities | (118.2) | (194.8) | (183.8)
Effect of exchange rate changes on cash and cash equivalents | 11.8 | (9.6) | (21.8)
Net increase (decrease) in cash and cash equivalents | 23.7 | (40.9) | (20.2)
Cash and cash equivalents at beginning of period | 188.5 | 229.4 | 249.6
Cash and cash equivalents at end of period | $ 212.2 | $ 188.5 | $ 229.4

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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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