Long-term debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	May 04, 2024	Feb. 03, 2024	Apr. 29, 2023
Debt Instrument [Line Items]
Gross debt	$ 147.8	$ 147.8	$ 147.7
Less: Current portion of long-term debt	(147.8)	(147.7)	0.0
Less: Unamortized debt issuance costs	0.0	(0.1)	(0.2)
Long-term debt	0.0	0.0	147.5
Senior Unsecured Notes
Debt Instrument [Line Items]
Gross debt	$ 147.8	$ 147.8	$ 147.7