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Supplemental Financial Statement Information | 12 Months Ended
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Dec. 31, 2021
Additional Financial Information Disclosure [Abstract] |
Supplemental Financial Statement Information | Supplemental Financial Statement Information Cash and cash equivalents at December 31, 2021 and 2020 were as follows:
(In millions) |  | 2021 |  | 2020
Cash |  | $ | 222.8 |  |  | $ | 158.2 |
Other short-term investments |  | 464.9 |  |  | 487.7 |
Total cash and cash equivalents |  | $ | 687.7 |  |  | $ | 645.9 |
Other current liabilities included salaries, wages and other employee-related liabilities of $92.7 million and $92.8 million, and accrued interest of $15.2 million and $18.0 million at December 31, 2021 and 2020, respectively. Other income (expense) for the years ended December 31, 2021, 2020, and 2019 was as follows:
(in millions) |  | 2021 |  | 2020 |  | 2019*
Rent, royalty income and other income |  | $ | 1.1 |  |  | $ | 0.9 |  |  | $ | 2.9 |
Gains from disposal of property, plant and equipment, net |  | 2.9 |  |  | 2.9 |  |  | 90.7 |
Net equity income (loss) on joint ventures (See Note 7) |  | 0.1 |  |  | (7.0) |  |  | (10.7) |
Gain (loss) on sales of businesses, net (See Note 6) |  | 13.8 |  |  | — |  |  | (7.1) |
Joint venture restructuring and impairment charges (See Note 7) |  | — |  |  | (2.4) |  |  | (11.4) |
Adjustment to indemnification for conditional ARO costs (See Note 8) |  | — |  |  | 4.3 |  |  | — |
Other |  | 0.3 |  |  | 0.1 |  |  | — |
Total other income (expense), net |  | $ | 18.2 |  |  | $ | (1.2) |  |  | $ | 64.4 |
* The year ended December 31, 2019 reflects impacts from the change in inventory accounting method, as described in Note 1 of the Notes to the Consolidated Financial Statements. Gains from disposal of property, plant and equipment, net for the years ended December 31, 2020 and 2019 include $2.5 million and $91.7 million, respectively, on sales of certain oil and gas rights in Eddy County, NM. These cash gains are reported as an investing activity on the consolidated statement of cash flows for the years ended December 31, 2020 and 2019, and are excluded from segment operating results. These oil and gas rights were initially acquired in 1972 along with land purchased by Teledyne, Inc., which later became part of ATI. The land was subsequently sold, with the Company retaining the underlying oil and gas rights that it sold in 2019 and 2020.

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