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Savings, Pension and Other Postretirement Employee Benefit Plans - Investments at Fair Value for Company Sponsored Pension Benefit Plans Within Fair Value Hierarchy (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 1.6 $ 5.8
Investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 231.7 317.5
Defined Benefit Plan, Common Collective Trust    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 230.1 311.7
Fair Value, Inputs, Level 1 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1.6 5.8
Fair Value, Inputs, Level 1 | Investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1.6 5.8
Fair Value, Inputs, Level 1 | Defined Benefit Plan, Common Collective Trust    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Fair Value Measured at Net Asset Value Per Share | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Fair Value Measured at Net Asset Value Per Share | Investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 230.1 311.7
Fair Value Measured at Net Asset Value Per Share | Defined Benefit Plan, Common Collective Trust    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 230.1 $ 311.7