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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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- Definition

Amount of amortization expense attributable to debt issuance costs.

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Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

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Amount of interest income earned from interest bearing assets classified as other.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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