Goodwill and intangibles - Summary of Future Amortization (Details) - USD ($) $ in Millions	Jan. 29, 2022	Jan. 30, 2021
Intangible assets amortization
Fiscal 2023	$ 2.4
Fiscal 2024	1.9
Fiscal 2025	1.3
Fiscal 2026	1.2
Fiscal 2027	1.2
Thereafter	2.5
Net carrying amount	10.5	$ 1.4
Intangible liabilities amortization
Fiscal 2023	(1.8)
Fiscal 2024	(1.8)
Fiscal 2025	(1.8)
Fiscal 2026	(1.8)
Fiscal 2027	0.0
Thereafter	0.0
Total	$ (7.2)	$ (10.5)

Finite-Lived Intangible Liabilities, Amortization Expense, after Year Five

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Finite-Lived Intangible Liabilities, Amortization Expense, Next Twelve Months

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Five

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Four

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Three

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Two

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Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

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Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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