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Income Taxes - Valuation allowance (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Valuation allowance |  |
Valuation allowance | $ 23.8 | $ 20.3
Undistributed earnings of the Company's foreign subsidiaries | 94.0 |
Foreign Tax Credits |  |
Valuation allowance |  |
Valuation allowance | 16.8 | 12.8
Foreign | Operating Losses |  |
Valuation allowance |  |
Valuation allowance | $ 5.4 | $ 5.8

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