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Supplemental Financial Statement Information - (Notes) | 6 Months Ended
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Jun. 30, 2021
Other Income and Expenses [Abstract] |
Supplemental Financial Statement Information | Supplemental Financial Statement Information Other income (expense), net for the three and six months ended June 30, 2021 and 2020 was as follows:
(in millions) | Three months ended June 30, | Six months ended June 30,
| 2021 |  | 2020 | 2021 |  | 2020
Rent and royalty income | $ | 0.2 |  |  | $ | 0.2 |  | $ | 0.5 |  |  | $ | 0.5 |
Gains from disposal of property, plant and equipment, net | 1.2 |  |  | — |  | 2.4 |  |  | 2.5 |
Net equity loss on joint ventures (See Note 5) | — |  |  | (1.9) |  | — |  |  | (5.6) |
Joint venture restructuring charges (See Note 5) | — |  |  | (2.4) |  | — |  |  | (2.4) |
Adjustment to indemnification for conditional ARO costs | — |  |  | 4.3 |  | — |  |  | 4.3 |
Other | — |  |  | 0.3 |  | — |  |  | 0.3 |
Total other income (expense), net | $ | 1.4 |  |  | $ | 0.5 |  | $ | 2.9 |  |  | $ | (0.4) |
Gains from disposal of property, plant and equipment, net for the six months ended June 30, 2020 included a $2.5 million gain on the sale of certain oil and gas rights. This cash gain was reported as an investing activity on the consolidated statement of cash flows for the six months ended June 30, 2020 and is excluded from segment operating results. In the second quarter of 2020, the Company finalized a settlement agreement for an indemnity claim concerning a conditional asset retirement obligation (ARO) with the buyer of a formerly-owned business and as a result, the Company reduced ARO reserves by $4.3 million. Restructuring Restructuring charges for the second quarter and six months ended June 30, 2021 were a net credit of $6.2 million, primarily related to $6.9 million for lowered severance-related reserves for approximately 200 employees based on changes in planned operating rates and revised workforce reduction estimates. This was offset by $0.7 million of other costs related to facility idlings. For the second quarter and six months ended June 30, 2020, the Company recorded restructuring charges of $16.7 million and $24.7 million, respectively, which are presented as restructuring charges in the consolidated statements of operations. These charges were a result of workforce right-sizing actions to better match the Company’s cost structure to expected demand, primarily as a result of economic challenges created by the COVID-19 pandemic. For the second quarter of 2020, these charges are comprised of severance obligations for the elimination of approximately 550 positions for both involuntary reductions and voluntary retirement incentive programs related to both salary and hourly employees in the HPMC segment. For the six months ended June 30, 2020, these charges also include severance obligations for the reduction of approximately 90 positions for a voluntary retirement incentive program completed in the first quarter of 2020 for eligible salaried employees. Restructuring reserves for severance cost activity is as follows:
| Severance and Employee
| Benefit Costs
Balance at December 31, 2020 | $ | 43.4 |
Adjustments | (6.9) |
Payments | (10.2) |
Balance at June 30, 2021 | $ | 26.3 |
The $26.3 million restructuring reserve balance at June 30, 2021 includes $18.2 million recorded in other current liabilities and $8.1 million recorded in other long-term liabilities on the consolidated balance sheet.

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- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
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