Other accrued liabilities - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Payrolls and commissions	$ 84.8	$ 99.1
Income taxes	41.3	37.7
Operating leases	26.0	35.4
Taxes other than income taxes	23.2	26.6
Accrued vacations	21.1	20.8
Cost reduction	11.7	14.9
Postretirement	11.7	12.1
Accrued interest	5.9	6.1
Other	45.9	48.2
Total other accrued liabilities	$ 271.6	$ 300.9