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Goodwill and intangibles - Schedule of Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2023
Jan. 29, 2022
Jan. 30, 2021
Goodwill [Roll Forward]      
Beginning balance $ 484.6    
Ending balance 751.7 $ 484.6  
North America      
Goodwill [Roll Forward]      
Beginning balance 484.6 238.0  
Acquisitions 267.1 246.6  
Ending balance 751.7 484.6  
Accumulated impairment losses $ 576.0 $ 576.0 $ 576.0