Non-operating Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Nonoperating Income (Expense) [Abstract]
Interest Expense	$ (10.4)	$ (9.1)	$ (18.6)	$ (18.2)
Amortization of Debt Issuance Costs	(0.4)	(0.5)	(0.8)	(0.9)
Interest Income, Other	0.1	0.2	0.1	0.6
Interest Expense, Net	(10.7)	(9.3)	(19.3)	(18.6)
Write off of Deferred Debt Issuance Cost	(0.3)	0.0	(0.5)	0.0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	(1.4)	(2.5)	(2.8)	(5.0)
Nonoperating Income (Expense)	$ (12.4)	$ (11.8)	$ (22.7)	$ (23.6)

Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net amount of nonoperating interest income (expense).

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

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Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.

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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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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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