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Income taxes (Tables)
9 Months Ended
Oct. 30, 2021
Income Tax Disclosure [Abstract]  
Reconciliation Of Effective Tax Rate
39 weeks ended
October 30, 2021October 31, 2020
Estimated annual effective tax rate before discrete items22.1 %19.5 %
Discrete items recognized
(15.5)%8.6 %
Effective tax rate recognized in statements of operations
6.6 %28.1 %