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Summary of Significant Accounting Policies (PP&E) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 2,979.8 $ 2,933.4  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (1,989.7) (1,916.3)  
Property, plant and equipment, net 990.1 1,017.1  
Finance Lease, Right-of-Use Asset, before Accumulated Amortization 29.9 31.8  
Depreciation and amortization 98.6 103.3 $ 105.0
Property, Plant and Equipment      
Property, Plant and Equipment [Line Items]      
Depreciation and amortization 96.4 101.1 $ 102.0
Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 461.0 456.8  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 2,359.9 2,346.5  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 53.0 23.9  
Land and Land Improvements      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 106.0 $ 106.1  
Minimum | Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Minimum | Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Minimum | Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Maximum | Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 40 years    
Maximum | Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 40 years    
Maximum | Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 25 years