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Goodwill and intangibles - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 02, 2020 | Aug. 03, 2019 | May 04, 2019 | Feb. 02, 2019 | May 05, 2018 | Jan. 30, 2021 | Feb. 01, 2020 | Feb. 02, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill, impairment loss |  |  |  |  |  | $ 10.7 | $ 47.7 | $ 521.2
Indefinite-lived intangible asset impairment |  |  |  |  |  | 83.3 | 0.0 | 214.2
Amortization of intangible assets |  |  |  |  |  | 0.9 | 0.9 | 4.0
Amortization of intangible liabilities |  |  |  |  |  | 5.4 | 5.5 | 7.9
North America |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill, impairment loss | $ 10.7 | $ 47.7 |  |  |  | $ 10.7 | $ 47.7 | 308.8
Impairment of intangible assets (excluding goodwill) |  |  |  | $ 74.3 |  |  |  |
North America | R2Net Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill, impairment loss |  | 12.5 |  |  |  |  |  | 208.8
Goodwill and intangible asset impairment |  |  | $ 69.3 |  |  |  |  |
North America | Zales |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill, impairment loss |  | $ 35.2 |  |  |  |  |  |
Impairment of intangible assets (excluding goodwill) |  |  |  |  | $ 139.9 |  |  |
Indefinite-lived intangible asset impairment | $ 83.3 |  |  |  |  |  |  |
Other | R2Net Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill, impairment loss |  |  |  |  |  |  |  | $ 3.6

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