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Leasing - Right of Use Assets and Lease Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Right-of-Use Asset $ 88.1 $ 102.4
Operating lease right-of-use assets 110.3 115.6
Finance Lease, Liability 84.7 98.5
Operating Lease, Liability 112.7 117.4
Property, plant and equipment, net [Member]    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Right-of-Use Asset 88.1 102.4
Operating lease right-of-use assets 0.0 0.0
Operating lease right-of-use assets [Member]    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Right-of-Use Asset 0.0 0.0
Operating lease right-of-use assets 110.3 115.6
Current portion of operating lease liabilities    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Liability 0.0 0.0
Operating Lease, Liability 22.8 21.9
Accrued expenses and other [Member]    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Liability 8.3 11.2
Operating Lease, Liability 0.0 0.0
Long-term portion of operating lease liabilities    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Liability 0.0 0.0
Operating Lease, Liability 89.9 95.5
Postretirement benefits and other long-term liabilities [Member]    
Right of use assets and lease liabilities [Line Items]    
Finance Lease, Liability 76.4 87.3
Operating Lease, Liability $ 0.0 $ 0.0