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Supplementary Data Accrued Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Accrued Liabilities [Abstract] |  |
Salaries, benefits and related expenses | $ 294.4 | $ 432.1
Income Taxes payable | 46.4 | 80.3
Interest | 39.0 | 37.5
Office and related expenses | 16.9 | 18.7
Acquisition obligations | 5.3 | 5.3
Restructuring charges | 61.0 | 0.4
Other | 98.4 | 87.3
Total Accrued Liabilities | $ 561.4 | $ 661.6

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