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Retirement plans - Fair Value of Unfunded, Non-qualified Deferred Compensation Plans Assets (Details) - USD ($) $ in Millions	Jan. 28, 2023	Jan. 29, 2022
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	$ 22.3	$ 22.7
Mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	16.6	12.4
Level 1
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	16.6	12.4
Level 1 | Mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	16.6	12.4
NAV | Money market mutual funds
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan assets	$ 5.7	$ 10.3

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

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+ References

No definition available.

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