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Revenue recognition - Unamortized Deferred Selling Costs (Details) - USD ($)
$ in Millions
Jan. 29, 2022
Jan. 30, 2021
Revenue from Contract with Customer [Abstract]    
Other current assets $ 28.4 $ 26.2
Other assets 87.8 85.1
Total deferred selling costs $ 116.2 $ 111.3