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Retirement plans - Fair Value of Unfunded, Non-qualified Deferred Compensation Plans Assets (Details) - USD ($) $ in Millions | Feb. 01, 2025 | Feb. 03, 2024
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Defined Contribution Plan Disclosure [Line Items] |  |
Deferred compensation plan assets | $ 31.0 | $ 25.2
Mutual funds |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Deferred compensation plan assets | 28.3 | 22.4
Level 1 |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Deferred compensation plan assets | 28.3 | 22.4
Level 1 | Mutual funds |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Deferred compensation plan assets | 28.3 | 22.4
NAV | Money market mutual funds |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Deferred compensation plan assets | $ 2.7 | $ 2.8

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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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