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Warranty reserve - Components of Warranty Reserve (Details) - USD ($)
$ in Millions
Apr. 29, 2023
Jan. 28, 2023
Apr. 30, 2022
Jan. 29, 2022
Other Liabilities Disclosure [Abstract]        
Accrued expense and other current liabilities $ 11.4 $ 11.3 $ 10.6  
Other liabilities - non-current 29.9 29.5 27.1  
Total warranty reserve $ 41.3 $ 40.8 $ 37.7 $ 36.0