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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Activities: |  |  |
Consolidated net income | $ 168.5 | $ 115.8 | $ 136.4
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, depletion and amortization | 94.6 | 93.9 | 98.4
Loss on disposal of property, plant and equipment | 0.4 | 0.2 | 1.9
Deferred income taxes | 2.1 | (2.7) | (1.4)
Pension amortization and settlement loss | 13.1 | 13.1 | 9.2
Provision for bad debts | 0.9 | 2.6 | 6.3
Stock-based compensation | 10.7 | 10.2 | 8.1
Asset write-downs | 0.7 | 7.1 | 7.5
Reduction of right of use asset | 12.3 | 12.3 | 12.7
Other non-cash items | (2.8) | (2.2) | (1.9)
Changes in operating assets and liabilities |  |  |
Accounts receivable | (7.2) | 13.7 | 9.9
Inventories | (58.2) | 8.3 | (16.0)
Pension plan funding | (11.1) | (12.2) | (7.7)
Accounts payable | 43.0 | (16.7) | (5.1)
Restructuring liabilities | (1.4) | (1.2) | 2.4
Income taxes payable | (6.0) | 3.9 | 2.5
Prepaid expenses and other | (27.2) | (5.5) | (24.9)
Net cash provided by operating activities | 232.4 | 240.6 | 238.3
Investing Activities: |  |  |
Purchases of property, plant and equipment | (86.0) | (66.8) | (65.0)
Cash paid for acquisitions, net of cash acquired | (194.4) | (9.2) | 0.0
Proceeds from sale of assets | 0.7 | 0.7 | 0.0
Purchases of short-term investments | (9.4) | (8.7) | (5.5)
Proceeds from sale of short-term investments | 8.3 | 5.3 | 7.7
Other investing activities | 2.2 | 0.0 | 0.8
Net cash used in investing activities | (278.6) | (78.7) | (62.0)
Financing Activities: |  |  |
Long-term debt issuance | 0.0 | 400.0 | 0.0
Debt issuance costs | 0.0 | (6.4) | 0.0
Repayment of long-term debt | (1.2) | (290.1) | (88.2)
Proceeds from issuance of short-term debt | 100.5 | 0.0 | 0.0
Repayment of short-term debt | (20.5) | (101.2) | (4.0)
Purchase of common stock for treasury | (74.7) | (40.7) | (41.0)
Proceeds from issuance of stock under option plan | 12.8 | 3.2 | 2.2
Tax withholding payments for stock-based compensation | (2.7) | (2.0) | (1.7)
Dividends paid to non-controlling interests | (1.8) | (0.7) | (4.2)
Capital contribution from non-controlling interests | 0.0 | 1.7 | 0.6
Cash dividends paid | (6.8) | (6.8) | (7.0)
Net cash provided by (used in) financing activities | 5.6 | (43.0) | (143.3)
Effect of exchange rate changes on cash and cash equivalents | (27.6) | 7.2 | (0.2)
Net increase (decrease) in cash and cash equivalents | (68.2) | 126.1 | 32.8
Cash and cash equivalents at beginning of period | 367.7 | 241.6 | 208.8
Cash and cash equivalents at end of period | 299.5 | 367.7 | 241.6
Non-cash financing activities |  |  |
Treasury stock purchases settled after period end | $ 0.5 | $ 1.8 | $ 1.1

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- Definition The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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