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Debt and Credit Arrangements - Carrying Value and Fair Value Disclosures (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Term Loan | Term loans due March 2030
Debt Instrument
Carrying Value	$ 1,519.7	$ 1,517.4
Fair Value	1,582.0	1,589.9
Secured Debt | Senior secured notes due 2030
Debt Instrument
Carrying Value	1,424.1	1,425.6
Fair Value	1,516.1	1,517.9
Unsecured Debt | Senior unsecured notes due 2031
Debt Instrument
Carrying Value	492.6	492.2
Fair Value	$ 545.0	$ 546.9

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