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ENVIRONMENTAL (Tables)
3 Months Ended
Mar. 31, 2022
Environmental Remediation Obligations [Abstract]  
Environmental Provisions Charged to Income [Table Text Block] Environmental provisions charged to income, which are included in costs of goods sold, were as follows:
 Three Months Ended March 31,
 20222021
 ($ in millions)
Provisions charged to income$5.6 $2.5 
Recoveries for costs incurred and expensed— (2.2)
Environmental expense$5.6 $0.3 
Environmental expense for the three months ended March 31, 2021 includes $2.2 million of insurance recoveries for environmental costs incurred and expensed in prior periods.