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Retirement and Other Postretirement Benefit Plans - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans |  |  | $ 0.7 |  |
Defined Benefit Retirement Plans |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Amounts unrelated to service costs, benefit | $ 0.2 | $ 1.0 | 0.7 | $ 3.0 |
Defined Benefit Retirement Plans | U.S. |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans |  |  | $ 0.6 |  |
Defined Benefit Plan, Tax Status [Extensible List] | Non qualified | Non qualified | Non qualified | Non qualified | Non qualified
Net amortization gain deferral | $ 0.2 | $ (0.2) | $ 0.4 | $ (0.6) |
Defined Benefit Retirement Plans | European |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Employer contribution to defined benefit retirement plans |  |  | 0.8 |  |
Expected employer contribution in full current year | 1.1 |  | 1.1 |  |
Net amortization gain deferral | (0.0) | (0.6) | (0.1) | (1.8) |
Postretirement Health Care and Life Insurance Benefit Plans |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Net amortization gain deferral | 0.0 | $ 0.3 | 0.0 | $ 0.8 |
Postretirement Health Care and Life Insurance Benefit Plans | Maximum |  |  |  |  |
Amounts recognized on the balance sheet: |  |  |  |  |
Expected employer contribution in full current year | $ 0.2 |  | $ 0.2 |  |

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