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Other Operating Charges, net (Tables)
9 Months Ended
Sep. 30, 2023
Other Income and Expenses [Abstract]  
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Quarter Ended September 30,Nine Months Ended September 30,
2023202220232022
Reorganization and other expenses $— $— $— $1.6 
Costs associated with mill closure— — — 0.4 
Loss on sale or impairment associated with assets0.3 1.2 1.4 5.8 
Directors' equity-based compensation expense1.0 1.0 0.6 0.7 
Other0.5 — 0.4 — 
$1.8 $2.2 $2.4 $8.5