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Other Balance Sheet Items Other balance Sheet items (Other long-term assets) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Balance Sheet Related Disclosures [Abstract] |  |
Prepaid Expense, Noncurrent | $ 13.5 | $ 4.8
Operating Lease, Right-of-Use Asset | 9.3 | 7.4
Prepaid registry fees, noncurent | 8.2 | 8.3
Restricted Cash | 5.4 | 5.4
Other Assets, Miscellaneous, Noncurrent | 3.0 | 3.1
Total other long-term assets | $ 39.4 | $ 29.0

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