Warranty reserve - Schedule of Activity in Warranty Reserve (Details) - USD ($) $ in Millions	3 Months Ended
	May 04, 2024	Apr. 29, 2023
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 43.7	$ 40.8
Warranty expense	2.3	3.5
Utilized	(2.8)	(3.0)
Balance at end of period	$ 43.2	$ 41.3