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Warranty reserve - Components of Warranty Reserve (Details) - USD ($)
$ in Millions
Oct. 28, 2023
Jul. 29, 2023
Jan. 28, 2023
Oct. 29, 2022
Jul. 30, 2022
Jan. 29, 2022
Other Liabilities Disclosure [Abstract]            
Accrued expenses and other current liabilities $ 11.8   $ 11.3 $ 11.0    
Other liabilities - non-current 31.5   29.5 28.6    
Total warranty reserve $ 43.3 $ 42.9 $ 40.8 $ 39.6 $ 38.5 $ 36.0