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%