Goodwill and intangibles - Composition of Finite-Lived Intangibles (Details) - USD ($) $ in Millions	May 04, 2024	Feb. 03, 2024	Apr. 29, 2023
Intangible assets, net:
Gross carrying amount	$ 11.2	$ 11.2	$ 15.8
Accumulated  amortization	(7.9)	(7.5)	(8.1)
Net carrying amount	3.3	3.7	7.7
Indefinite-lived intangible assets	398.9	399.1	399.1
Intangible assets, gross	410.1	410.3	414.9
Total intangible assets, net	402.2	402.8	406.8
Intangible liabilities, net
Gross carrying amount	(38.0)	(38.0)	(38.0)
Accumulated amortization	34.9	34.4	33.1
Total	$ (3.1)	$ (3.6)	$ (4.9)

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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