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Retirement plans - Components of Net Periodic Pension Cost (Details) - Pension plan - Foreign Plan - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 28, 2023 | Jul. 30, 2022 | Apr. 30, 2022 | Jan. 28, 2023 | Jan. 29, 2022 | Jan. 30, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Interest cost |  |  |  | $ (1.0) | $ (3.3) | $ (4.0)
Expected return on UK Plan assets |  |  |  | (0.3) | 3.0 | 5.5
Amortization of unrecognized actuarial losses |  |  |  | (3.5) | (2.1) | (0.9)
Amortization of unrecognized net prior service costs |  |  |  | (0.3) | (0.1) | (0.1)
Pension settlement loss | $ (0.9) | $ (0.9) | $ (131.9) | (133.7) | 0.0 | 0.0
Total net periodic benefit (cost) income |  |  |  | (138.8) | (2.5) | 0.5
Other changes in assets and benefit obligations recognized in OCI |  |  |  | 137.0 | (69.2) | 6.5
Total recognized in net periodic pension benefit (cost) income and OCI |  |  |  | $ (1.8) | $ (71.7) | $ 7.0

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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