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Debt - Summary of long-term debt (Details) - USD ($)
$ in Millions
Nov. 10, 2023
Dec. 31, 2024
Dec. 31, 2023
Debt      
Other long-term debt   $ 38.0 $ 38.0
Total debt at face value   1,002.0 1,012.0
Current maturities and unamortized costs   (15.0) (15.0)
Long-term debt, less current maturities   987.0 997.0
Term loan due 2033      
Debt      
Total debt   $ 963.0 $ 973.0
Face amount $ 975.0    
Quarterly amortization of principal balance 2.5    
Effective interest rate (as a percent)   6.08% 7.08%
Term loan due 2028      
Debt      
Face amount $ 700.0    
Foreign subsidiary obligations      
Debt      
Total debt   $ 1.0 $ 1.0
Note due 2027      
Debt      
Face amount   $ 30.0  
Interest rate (as a percent)   1.28%