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Supplemental Financial Statement Information - (Tables)

6 Months Ended

Jun. 30, 2021

Other Income and Expenses [Abstract]

Schedule of Other Expense, Net

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)

Roll Forward of Restructuring Reserve Activity

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

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The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

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Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets.

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