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Other Operating Charges, net (Tables)
3 Months Ended
Mar. 31, 2022
Other Income and Expenses [Abstract]  
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Quarter Ended March 31,
20222021
Reorganization and other expenses $1.5 $— 
Mill closure costs0.4 — 
Directors' equity-based compensation expense(1.4)0.4 
$0.5 $0.4