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