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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Activities |  |  |
Net income | $ 326.5 | $ 291.7 | $ 262.3
Adjustments to reconcile net income to cash provided by operations: |  |  |
Depreciation and amortization | 401.4 | 109.3 | 103.2
Stock-based compensation expense | 50.0 | 25.3 | 21.3
Below market intangible amortization | (82.2) | 0.0 | 0.0
Deferred income taxes | (27.3) | (5.3) | (67.4)
Loss on disposal of property, plant and equipment | 15.9 | 0.9 | 1.9
Changes in operating assets and liabilities, net of acquisitions |  |  |
Accounts receivable and unbilled accounts receivable | (6.3) | (54.6) | (68.7)
Inventories | 255.9 | (108.9) | (9.0)
Accounts payable | (144.3) | 48.8 | (91.7)
Accrued income taxes | 10.7 | 7.9 | 47.6
Accrued liabilities and customer deposits | (11.9) | 31.7 | (18.9)
Other assets and liabilities | 227.1 | (32.1) | 8.2
Net cash provided by operating activities | 1,015.5 | 314.7 | 188.8
Investing Activities |  |  |
Purchase of property, plant and equipment | (185.3) | (93.3) | (89.5)
Proceeds from disposal of property, plant and equipment | 3.9 | 11.3 | 1.3
Acquisitions of business, net of cash acquired | (2,996.4) | (51.2) | (945.3)
Other | 0.0 | (14.1) | 0.0
Net cash used for investing activities | (3,177.8) | (147.3) | (1,033.5)
Financing Activities |  |  |
Proceeds from debt, net of issuance costs | 3,982.4 | 3,480.7 | 1,216.7
Payments of debt | (3,423.6) | (1,454.0) | (1,269.5)
Proceeds from exercise of stock options and other benefit plans | 0.8 | 10.0 | 4.4
Payment of income tax withholding on share-based compensation | (6.3) | (12.3) | (6.8)
Payment of contingent consideration on acquisitions | (10.1) | 0.0 | 0.0
Cash dividends | (81.7) | (46.3) | (42.2)
Net cash provided by (used for) financing activities | 461.5 | 1,978.1 | (97.4)
Effect of changes in currency exchange rates | (37.3) | (36.6) | 32.3
(Decrease) increase in cash | (1,738.1) | 2,108.9 | (909.8)
Cash, cash equivalents and restricted cash, beginning of year | 2,342.3 | 233.4 | 1,143.2
Cash, cash equivalents and restricted cash, end of year | $ 604.2 | $ 2,342.3 | $ 233.4

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- Definition Amount of cash outflow for debt, mandatory redeemable security, and principal payment for finance lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Increase decrease in accrued liabilities and customer deposits. + References No definition available. + Details
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