Accounts receivable, net - Past Due Status (Details) - USD ($) $ in Millions	Jan. 29, 2022	Jan. 30, 2021
Financing Receivable, Past Due [Line Items]
Total at amortized cost	$ 97.5
Current
Financing Receivable, Past Due [Line Items]
Total at amortized cost		$ 81.3
1 - 30 days past due
Financing Receivable, Past Due [Line Items]
Total at amortized cost		9.1
31 - 60 days past due
Financing Receivable, Past Due [Line Items]
Total at amortized cost		2.6
61 - 90 days past due
Financing Receivable, Past Due [Line Items]
Total at amortized cost		1.7
Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Total at amortized cost		$ 2.8