XML 84 R66.htm IDEA: XBRL DOCUMENT v3.24.0.1
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, 2023
Dec. 31, 2022
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 1.9 $ 1.6
Investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 231.1 231.7
Defined Benefit Plan, Common Collective Trust    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 229.2 230.1
Fair Value, Inputs, Level 1 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1.9 1.6
Fair Value, Inputs, Level 1 | Investments    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 1.9 1.6
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 229.2 230.1
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 $ 229.2 $ 230.1