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Retirement and Other Postretirement Benefit Plans - Schedule of Amounts Recognized on Balance Sheet (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Amounts recognized on the balance sheet: |  |  |
Other non-current liabilities | $ 44.3 |  | $ 42.6
Defined Benefit Retirement Plans | U.S. |  |  |
Amounts recognized on the balance sheet: |  |  |
Accrued liabilities | 1.2 |  | 1.3
Other non-current liabilities | 16.8 |  | 16.8
Total accrued benefit | $ 18.0 |  | $ 18.1
Defined Benefit Plan, Tax Status [Extensible List] | Non qualified | Non qualified | Non qualified
Defined Benefit Retirement Plans | European |  |  |
Amounts recognized on the balance sheet: |  |  |
Accrued liabilities | $ 1.1 |  | $ 0.8
Other non-current liabilities | 12.8 |  | 12.3
Total accrued benefit | 13.9 |  | 13.1
Postretirement Health Care and Life Insurance Benefit Plans |  |  |
Amounts recognized on the balance sheet: |  |  |
Accrued liabilities | 0.2 |  | 0.2
Other non-current liabilities | 0.9 |  | 0.9
Total accrued benefit | $ 1.1 |  | $ 1.1

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