Income Taxes - Uncertain tax benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 02, 2024	Aug. 04, 2023	Aug. 02, 2024	Aug. 04, 2023
Income taxes
Reserves for uncertain tax benefits	$ 11.2		$ 11.2
Interest accrued related to uncertain tax benefits	1.6		1.6
Potential penalties accrued related to uncertain tax benefits	0.8		0.8
Total reserves for uncertain tax benefits included in noncurrent Other liabilities	13.6		13.6
Reserve for uncertain tax positions for which a reduction is reasonably possible in the next twelve months	2.1		2.1
Reserve for uncertain tax positions that would impact effective tax rate if recognized	$ 11.2		$ 11.2
Effective income tax rates (as a percent)	22.30%	22.90%	22.80%	22.30%