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STATEMENTS OF CONSOLIDATED CASH FLOWS (UNAUDITED) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities: |  |
Net income | $ 4.5 | $ 29.1
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation of property, plant and equipment | 12.8 | 12.5
Amortization of definite-lived intangible assets | 0.7 | 0.7
Amortization of debt premium and debt issuance costs | 0.7 | 0.3
Deferred income taxes | (0.9) | 14.8
Non-cash equity compensation | 3.1 | 1.7
Gain on disposition of short-term investments |  | (0.5)
Loss on disposition of property, plant and equipment |  | 0.2
Changes in operating assets and liabilities, net of effects of acquisition: |  |
Trade and other receivables | (31.7) | (12.6)
Contract assets | (8.3) | 7.5
Inventories | (24.3) | (17.0)
Prepaid expenses and other current assets | (0.4) | (2.6)
Accounts payable | 33.0 | 21.7
Accrued liabilities | 4.2 | (2.4)
Annual variable cash contributions to Salaried VEBA | (1.7) | (2.9)
Long-term assets and liabilities, net | (3.1) | 1.9
Net cash (used in) provided by operating activities | (11.4) | 52.4
Cash flows from investing activities: |  |
Capital expenditures | (9.1) | (21.1)
Cash payment for acquisition of Warrick Rolling Mill | (617.5) |
Purchase of short-term investments |  | (39.1)
Proceeds from disposition of short-term investments |  | 78.8
Net cash (used in) provided by investing activities | (626.6) | 18.6
Cash flows from financing activities: |  |
Repayment of finance lease | (0.4) | (0.4)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares | (2.4) | (4.3)
Repurchase of common stock |  | (12.5)
Cash dividends and dividend equivalents paid | (11.7) | (11.3)
Net cash used in financing activities | (14.5) | (28.5)
Net (decrease) increase in cash, cash equivalents and restricted cash during the period | (652.5) | 42.5
Cash, cash equivalents and restricted cash at beginning of period | 794.3 | 278.6
Cash, cash equivalents and restricted cash at end of period | $ 141.8 | $ 321.1

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- Definition Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585 Reference 3: 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=121553693&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 Reference 3: 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=121553693&loc=d3e26853-111562 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, 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 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&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=121586364&loc=d3e3602-108585 + Details
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