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Other Operating Charges, net (Tables)
9 Months Ended
Sep. 30, 2022
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,
2022202120222021
Reorganization and other expenses $— $3.4 $1.6 $7.3 
Costs associated with mill closure— 5.4 0.4 47.1 
Impairment of equipment 1.2 — 5.8 — 
Directors' equity-based compensation expense1.0 1.4 0.7 0.6 
$2.2 $10.2 $8.5 $55.1