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Warranty reserve - Components of Warranty Reserve (Details) - USD ($)
$ in Millions
Nov. 01, 2025
Aug. 02, 2025
Feb. 01, 2025
Nov. 02, 2024
Aug. 03, 2024
Feb. 03, 2024
Other Liabilities Disclosure [Abstract]            
Accrued expenses and other current liabilities $ 8.9   $ 10.3 $ 10.9    
Other liabilities - non-current 25.2   28.7 30.2    
Total warranty reserve $ 34.1 $ 35.5 $ 39.0 $ 41.1 $ 42.3 $ 43.7