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Non-operating Income (Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Nonoperating Income (Expense) [Abstract] |  |  |  |
Interest Expense | $ (4.5) | $ (13.0) | $ (11.8) | $ (24.6)
Amortization of Debt Issuance Costs | (0.6) | (0.6) | (1.7) | (1.2)
Interest Income, Other | 0.3 | 0.4 | 1.4 | 1.8
Interest Expense, Net | (4.7) | (13.1) | (12.0) | (24.0)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | (0.3) | 0.3 | (0.9) | 1.0
Total non-operating expense | $ (5.0) | $ (12.8) | $ (12.9) | $ (22.9)

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