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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Operating activities: |  |  |
Net income attributable to common shareholders | $ 108.4 | $ 62.8 |
Gain on sale of property | (12.7) | 0.0 |
Depreciation and amortization | 31.6 | 29.9 |
Stock-based compensation expense | 6.3 | 5.8 |
Defined benefit plans and postretirement credit | (1.7) | (1.8) |
Deferred income taxes | 0.3 | 6.1 |
Cash used for operating working capital | (54.8) | (123.7) |
Defined benefit plans and postretirement contributions | (15.8) | (1.5) |
Environmental payments, net of reimbursements | (1.5) | (2.7) |
Asbestos related payments, net of insurance recoveries | (10.8) | (11.7) |
Other | 0.9 | 1.3 |
Total provided by (used for) operating activities | 50.2 | (35.5) |
Investing activities: |  |  |
Payment for acquisition - net of cash acquired | 0.0 | (172.0) |
Proceeds from disposition of capital assets | 14.5 | 2.4 |
Capital expenditures | (4.9) | (7.8) |
Purchase of marketable securities | (10.0) | 0.0 |
Proceeds from sale of marketable securities | 30.0 | 0.0 |
Total provided by (used for) investing activities | 29.6 | (177.4) |
Financing activities: |  |  |
Dividends paid | (25.0) | (25.5) |
Reacquisition of shares on open market | 0.0 | (70.0) |
Stock options exercised - net of shares reacquired | 7.2 | 0.1 |
Repayments of commercial paper with maturities greater than 90 days | (27.1) | 0.0 |
Proceeds from issuance of commercial paper with maturities greater than 90 days | 0.0 | 170.0 |
Net proceeds from issuance of commercial paper with maturities of 90 days or less | 0.0 | 14.5 |
Net borrowings under revolving credit facility | 0.0 | 45.2 |
Total (used for) provided by financing activities | (44.9) | 134.3 |
Effect of exchange rates on cash and cash equivalents | (7.5) | (12.5) |
Increase (decrease) in cash and cash equivalents | 27.4 | (91.1) |
Cash and cash equivalents at beginning of period | 551.0 | 393.9 | $ 393.9
Cash and cash equivalents at end of period | 578.4 | 302.8 | $ 551.0
Detail of cash used for operating working capital: |  |  |
Accounts receivable | (55.1) | 12.0 |
Inventories | (1.6) | (31.1) |
Other current assets | (19.0) | (17.1) |
Accounts payable | 16.9 | (61.1) |
Accrued liabilities | (18.7) | (26.5) |
U.S. and foreign taxes on income | 22.7 | 0.1 |
Cash used for operating working capital | (54.8) | (123.7) |
Supplemental disclosure of cash flow information: |  |  |
Interest paid | 9.9 | 8.0 |
Income taxes paid | $ 5.7 | $ 11.3 |

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- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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- Definition Amount of cash outflow for pension and other postretirement benefits. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the 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=118932676&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or cash outflow from issuing (borrowing) and repaying commercial paper. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + 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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