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Revenue recognition - Unamortized Deferred Selling Costs (Details) - USD ($)
$ in Millions
Oct. 30, 2021
Jan. 30, 2021
Oct. 31, 2020
Revenue from Contract with Customer [Abstract]      
Other current assets $ 25.2 $ 26.2 $ 24.0
Other assets 87.2 85.1 81.7
Total deferred selling costs $ 112.4 $ 111.3 $ 105.7