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Supplemental Financial Information (Accrued Liabilities) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Supplemental Financial Information [Abstract] |  |
Current contract liabilities (deferred revenues) | $ 79.0 | $ 87.2
Personnel costs | 90.0 | 89.2
Accrued claims | 16.1 | 39.5
Income and other taxes payable | 105.1 | 57.2
Accrued interest | 38.4 | 15.3
Lease liabilities | 35.0 | 28.0
Other | 27.3 | 34.6
Accrued liabilities and other | $ 390.9 | $ 351.0

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