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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

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