Segment information - Summary of Activity by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	May 01, 2021	May 02, 2020
Segment Reporting Information [Line Items]
Sales	$ 1,688.8	$ 852.1
Operating income (loss)	168.7	(299.6)
Interest expense, net	(3.9)	(7.1)
Other non-operating income, net	0.1	0.1
Income (loss) before income taxes	164.9	(306.6)
Restructuring charges	(0.7)	12.7
Asset impairments	1.5	136.3
Restructuring benefit due to change in inventory reserves	0.0	(0.4)
North America
Segment Reporting Information [Line Items]
Sales	1,618.0	781.1
International
Segment Reporting Information [Line Items]
Sales	57.4	64.9
Other
Segment Reporting Information [Line Items]
Sales	13.4	6.1
Reportable segments | North America
Segment Reporting Information [Line Items]
Sales	1,618.0	781.1
Operating income (loss)	212.0	(234.2)
Acquisition and integration related costs	1.1
Restructuring charges	(0.7)
Asset impairments	1.5	117.9
Restructuring benefit due to change in inventory reserves		(0.4)
Severance costs		8.9
Reportable segments | International
Segment Reporting Information [Line Items]
Sales	57.4	64.9
Operating income (loss)	(19.7)	(38.6)
Asset impairments		18.4
Severance costs		3.6
Reportable segments | Other
Segment Reporting Information [Line Items]
Sales	13.4	6.1
Operating income (loss)	(0.9)	(0.3)
Corporate and unallocated expenses
Segment Reporting Information [Line Items]
Operating income (loss)	$ (22.7)	(26.5)
Severance costs		0.2
Gain (loss) related to litigation settlement		$ (8.5)