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Goodwill and intangibles - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 03, 2024 | Aug. 03, 2024 | Jun. 01, 2024
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment |  | $ 123.0 |
Digital banners |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment | $ 123.0 |  |
Goodwill, Fair Value Disclosure |  |  | $ 203.1
Diamonds Direct | Trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Indefinite-lived intangible asset impairment | 7.0 |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure |  |  | 119.0
Blue Nile | Trade names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Indefinite-lived intangible asset impairment | $ 36.0 |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure |  |  | $ 60.0
North America |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Goodwill impairment |  | $ 123.0 |

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