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Condensed Consolidated Balance Sheets - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 34.4 $ 79.6
Receivables, Net 161.7 188.7
Inventories 283.2 258.0
Other current assets 8.7 19.1
Total current assets 487.9 545.4
Property, Plant and Equipment, Gross 2,379.5 2,328.4
Accumulated Depreciation and Amortization, Property, Plant, and Equipment (1,363.6) (1,305.4)
Property, Plant and Equipment, Net 1,015.9 1,023.1
Goodwill and intangible assets 2.7 52.9
Other assets, net 54.9 57.9
TOTAL ASSETS 1,561.4 1,679.2
Current liabilities:    
Accounts Payable and Accrued Liabilities, Current 231.7 319.7
Long-Term Debt, Current Maturities 0.6 0.6
Total current liabilities 232.4 320.4
Long-term debt, net 335.5 281.6
Liability for pension and other postretirement employee benefits 51.6 52.5
Deferred Income Tax Liabilities, Net 80.9 89.7
Other Liabilities, Noncurrent 78.2 80.5
Total liabilities 778.5 824.7
Stockholders' equity:    
Preferred Stock, Value, Issued 0.0 0.0
Common Stock, Value, Issued 0.0 0.0
Additional paid-in capital 8.2 11.5
Treasury Stock, Value (14.8) (3.3)
Retained earnings 823.9 880.8
Accumulated other comprehensive loss, net of tax (34.3) (34.5)
Total stockholders' equity 783.0 854.6
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 1,561.4 $ 1,679.2