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Supplemental Financial Statement Information
 12 Months Ended
Dec. 31, 2020
Additional Financial Information Disclosure [Abstract]  
Supplemental Financial Statement Information Supplemental Financial Statement Information
Cash and cash equivalents at December 31, 2020 and 2019 were as follows:
(In millions)20202019
Cash$158.2 $190.8 
Other short-term investments487.7 300.0 
Total cash and cash equivalents$645.9 $490.8 
Other current liabilities included salaries, wages and other employee-related liabilities of $92.8 million and $94.5 million, and accrued interest of $18.0 million and $25.0 million at December 31, 2020 and 2019, respectively.
Other income (expense) for the years ended December 31, 2020, 2019, and 2018 was as follows:
(in millions)202020192018
Rent, royalty income and other income$0.9 $2.9 $3.1 
Gains from disposal of property, plant and equipment, net2.9 90.7 1.3 
Net equity loss on joint ventures (See Note 9)(7.0)(10.7)(1.0)
Loss on sales of businesses, net (See Note 8)— (1.9)— 
Gain on joint venture deconsolidation (See Note 9)— — 15.9 
Joint venture restructuring and impairment charges (See Note 9)(2.4)(11.4)— 
Adjustment to indemnification for conditional ARO costs (See Note 10)4.3 — — 
Other0.1 0.1 1.2 
Total other income (expense), net$(1.2)$69.7 $20.5 
Gains from disposal of property, plant and equipment, net for the years ended December 31, 2020 and 2019 include a $2.5 million and $91.7 million gain, respectively, on the sale 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.