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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Accrued probable future environmental expenditures	$ 119.9		$ 119.9		$ 124.5
Expense related to environmental activities	3.0	$ 12.5	5.0	$ 13.0
Insurance recoveries	7.6		8.2	$ 4.5
Calvert City
Schedule of Equity Method Investments [Line Items]
Accrued probable future environmental expenditures	$ 107.7		$ 107.7

X

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

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The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

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