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Acquisitions and divestitures - Narrative (Details) |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 11, 2023 USD ($) | Aug. 19, 2022 USD ($) | Feb. 03, 2024 USD ($) | Feb. 01, 2025 USD ($) | Feb. 03, 2024 USD ($) | Jan. 28, 2023 USD ($) | Oct. 18, 2024 location
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  | $ 0 | $ 6,000,000.0 | $ 391,800,000 |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  |  | 0 | 53,800,000 | 0 |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  |  | (2,600,000) | $ 12,300,000 | 0 |
UK Prestige Watch Business |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of Stores | location |  |  |  |  |  |  | 21
Proceeds from Divestiture of Businesses, Net of Cash Divested |  |  | $ 53,800,000 |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  | $ 12,300,000 | $ (2,600,000) |  |  |
Blue Nile |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | $ 389,900,000 |  |  |  |  |
Cash acquired from acquisition |  | 16,600,000 |  |  |  |  |
Business combination, acquisition-related costs |  |  |  |  |  | $ 4,200,000 |
Intangible assets |  | 96,000,000.0 |  |  |  |  |
Other carryforwards |  | 71,000,000 |  |  |  |  |
Goodwill, expected tax deductible amount |  | 0 |  |  |  |  |
Blue Nile | Domestic Tax Jurisdiction |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Net operating loss carry forwards |  | 90,000,000 |  |  |  |  |
Blue Nile | Trade names |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets |  | $ 96,000,000 |  |  |  |  |
Service Jewelry & Repair, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 6,000,000 |  |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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