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Accounts receivable - Portfolio of Accounts Receivable (Details) - USD ($)
$ in Millions
Aug. 01, 2020
Feb. 01, 2020
Aug. 03, 2019
Receivables [Abstract]      
Customer in-house finance receivables, net $ 17.2 $ 0.0 $ 0.0
Accounts receivable, trade 8.5 34.4 16.3
Accounts receivable, held for sale 5.8 4.4 5.5
Accounts receivable, net $ 31.5 $ 38.8 $ 21.8