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Retirement plans - Fair Value of Unfunded, Non-qualified Deferred Compensation Plans Assets (Details) - USD ($) $ in Millions	Feb. 03, 2024	Jan. 28, 2023
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	$ 25.2	$ 22.3
Mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	22.4	16.6
Level 1
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	22.4	16.6
Level 1 | Mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	22.4	16.6
NAV | Money market mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	$ 2.8	$ 5.7

X

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480794/715-70-50-1

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