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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |  |
Net income | $ 661.8 | $ 346.2 | $ 241.7
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 116.9 | 104.7 | 100.0
Amortization | 5.4 | 4.4 | 3.4
Stock-based compensation | 37.5 | 34.0 | 24.4
Non-cash restructuring charges | 0.0 | 0.0 | 2.3
Pension settlement charge | 1.8 | 3.7 | 3.5
Contingent consideration payments in excess of acquisition-date liability | (1.4) | (0.9) | (0.5)
Fixed asset impairments and sale of equipment, net | 1.3 | 7.7 | 0.8
Deferred income taxes | (42.9) | (5.8) | 15.3
Pension and other retirement plans, net | 14.8 | 4.6 | (2.6)
Equity in undistributed earnings of affiliates, net of dividends | (17.4) | (15.8) | (6.7)
Changes in assets and liabilities: |  |  |
Increase in accounts receivable | (123.5) | (46.6) | (33.3)
Increase in inventories | (86.5) | (73.7) | (18.6)
(Increase) decrease in other current assets | (7.3) | 5.5 | 2.6
Increase in accounts payable | 16.8 | 36.6 | 25.3
Changes in other assets and liabilities | 6.7 | 67.9 | 9.6
Net cash provided by operating activities | 584.0 | 472.5 | 367.2
Cash flows from investing activities: |  |  |
Capital expenditures | (253.4) | (174.4) | (126.4)
Purchase of investment in affiliated companies | 0.0 | 0.0 | (85.1)
Acquisition of business | (2.2) | 0.0 | (18.9)
Other, net | 2.5 | (5.1) | 2.4
Net cash used in investing activities | (253.1) | (179.5) | (228.0)
Cash flows from financing activities: |  |  |
Borrowings under revolving credit agreements | 0.0 | 0.0 | 108.5
Repayments under revolving credit agreements | 0.0 | 0.0 | (136.3)
Issuance of long-term debt | 0.0 | 0.0 | 90.0
Debt issuance cost | 0.0 | 0.0 | (1.2)
Repayments of long-term debt | (2.2) | (2.3) | (0.1)
Dividend payments | (51.1) | (48.1) | (45.1)
Proceeds from stock-based compensation awards | 29.4 | 28.3 | 27.3
Employee stock purchase plan contributions | 7.7 | 6.4 | 5.4
Shares purchased under share repurchase programs | (137.1) | (115.5) | (83.1)
Shares repurchased for employee tax withholdings | (14.8) | (5.9) | (2.2)
Net cash used in financing activities | (168.1) | (137.1) | (36.8)
Effect of exchange rates on cash | (15.7) | 20.5 | (0.7)
Net increase in cash and cash equivalents | 147.1 | 176.4 | 101.7
Cash, including cash equivalents at beginning of period | 615.5 | 439.1 | 337.4
Cash, including cash equivalents at end of period | 762.6 | 615.5 | 439.1
Supplemental cash flow information: |  |  |
Interest paid, net of amounts capitalized | 8.0 | 8.1 | 8.6
Income taxes paid, net | 171.8 | 48.4 | 47.5
Accrued capital expenditures | 41.1 | 31.3 | 17.0
Dividends declared, not paid | 13.4 | 12.6 | 11.8
Purchase of investment in affiliated companies, treasury stock | $ 0.0 | $ 0.0 | $ 4.9

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