Debt - Summary of long-term debt (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 10, 2023	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Debt
Other long-term debt			$ 38.0	$ 38.0
Total debt at face value			1,012.0	710.0
Current maturities of long-term debt and unamortized discount			(15.0)	(8.0)
Long-term debt, less current maturities			997.0	$ 702.0
Term loan due 2033
Debt
Total debt			$ 973.0
Face amount	$ 975.0
Proceeds from issuance of debt, net of certain costs	307.0
Quarterly amortization of principal balance	2.5
Effective interest rate (as a percent)			7.08%	6.01%
Term loan due 2028
Debt
Total debt				$ 670.0
Face amount	$ 700.0
Foreign subsidiary obligations
Debt
Total debt			$ 1.0	$ 2.0
Equipment loan
Debt
Long-term debt assumed		$ 9.0
Interest rate (as a percent)		5.60%
Note due 2027
Debt
Face amount			$ 30.0
Interest rate (as a percent)			1.28%