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Other Operating Charges, net (Tables)
6 Months Ended
Jun. 30, 2023
Other Income and Expenses [Abstract]  
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Quarter Ended June 30,Six Months Ended June 30,
2023202220232022
Reorganization and other expenses $— $0.1 $— $1.6 
Costs associated with mill closure— — — 0.4 
Loss on sale or impairment associated with assets— 4.6 1.1 4.6 
Directors' equity-based compensation expense(0.2)1.1 (0.4)(0.3)
Other(0.3)— (0.1)— 
$(0.4)$5.7 $0.6 $6.3