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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
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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

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- 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 + Details
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