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Retirement plans - Additional Information (Details) $ in Millions | 12 Months Ended
--- | ---
Jan. 30, 2021 USD ($) plan | Feb. 01, 2020 USD ($) | Feb. 02, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Liability, defined contribution plan | $ 33.3 | $ 35.4 |
Pension plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer discretionary contribution amount | $ 3.2 | 9.1 | $ 10.4
Employer matching contribution, percent of match | 50.00% |  |
Employer matching contribution, maximum, percent of employees' gross pay | 6.00% |  |
Number of US non-qualified deferred compensation plans | plan | 2 |  |
Cost recognized | $ 0.8 | 3.6 | 3.6
Foreign Plan | Pension plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Future amortization of gain (loss) | (0.8) |  |
Future amortization of prior service cost | (0.1) |  |
Accumulated benefit obligation | 247.6 | 243.4 |
Employer contributions | 4.4 | 5.3 |
Employer discretionary contribution amount | 2.4 | $ 2.4 | $ 2.3
Foreign Plan | Pension plan | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimated future employer contributions in next fiscal year | $ 4.7 |  |
Foreign Plan | Pension plan | Debt Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations | 74.00% |  |
Foreign Plan | Pension plan | Diversified growth funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations | 21.00% |  |
Foreign Plan | Pension plan | Diversified equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations | 4.00% |  |
Foreign Plan | Pension plan | Real estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target plan asset allocations | 1.00% |  |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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