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Goodwill and intangibles - Composition of Finite-Lived Intangibles (Details) - USD ($)
$ in Millions
Aug. 03, 2024
Feb. 03, 2024
Jul. 29, 2023
Intangible assets, net:      
Gross carrying amount $ 11.2 $ 11.2 $ 15.8
Accumulated 
amortization (8.1) (7.5) (8.5)
Net carrying amount 3.1 3.7 7.3
Indefinite-lived intangible assets 355.8 399.1 399.2
Intangible assets, gross 367.0 410.3 415.0
Total intangible assets, net 358.9 402.8 406.5
Intangible liabilities, net      
Gross carrying amount (38.0) (38.0) (38.0)
Accumulated amortization 35.3 34.4 33.5
Total $ (2.7) $ (3.6) $ (4.5)