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Non-operating Income (Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Nonoperating Income (Expense) [Abstract] |  |  |  |
Interest Expense | $ (13.0) | $ (3.0) | $ (24.6) | $ (9.1)
Amortization of Debt Issuance Costs | (0.6) | (0.1) | (2.0) | (0.9)
Interest Income, Other | 0.4 | 0.9 | 1.8 | 1.5
Interest Expense, Net | (13.1) | (2.2) | (24.0) | (7.9)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | 0.3 | 0.1 | 1.0 | 0.3
Total non-operating expense | $ (12.8) | $ (2.1) | $ (22.9) | $ (7.6)

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