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Debt and Credit Arrangements - Carrying Value and Fair Value Disclosures (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Term Loan | Term loans due March 2030
Debt Instrument
Carrying Value	$ 1,454.0	$ 1,517.4
Fair Value	1,517.3	1,589.9
Secured Debt | Senior secured notes due 2030
Debt Instrument
Carrying Value	1,427.1	1,425.6
Fair Value	1,523.0	1,517.9
Unsecured Debt | Senior unsecured notes due 2031
Debt Instrument
Carrying Value	493.8	492.2
Fair Value	$ 546.8	$ 546.9

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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