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Other Operating Charges, net (Tables)
12 Months Ended
Dec. 31, 2020
Operating Expenses [Abstract]  
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
The major components of “Other operating charges, net” in the Consolidated Statements of Operations for the years ended December 31 are reflected in the table below:
Years Ended December 31,
(In millions)202020192018
Reorganization expenses$3.4 $2.9 $8.0 
Union settlement6.6 — — 
Miscellaneous environmental accruals2.5 1.0 — 
Directors' equity-based compensation expense (benefit)2.9 0.3 (2.3)
Gain on divested assets, net(1.4)— (24.0)
Other— 2.1 0.8 
$14.0 $6.3 $(17.5)