Income taxes - Schedule of Activity of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
Feb. 03, 2024	Jan. 28, 2023	Jan. 29, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of period	$ 85.9	$ 24.9	$ 25.4
Increases related to current year tax positions	1.5	1.6	2.0
Increases from acquisitions	0.0	2.3	0.0
Increases related to prior year tax positions	0.0	59.6	0.4
Settlements with tax authorities	(59.6)	0.0
Lapse of statute of limitations	(1.8)	(2.4)	(2.9)
Foreign currency translation	0.0	(0.1)
Foreign currency translation			0.0
Unrecognized tax benefits, end of period	$ 26.0	$ 85.9	$ 24.9

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A

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- Definition

Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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