Seasonal Revenues, Fourth Quarter Sales, Percent

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Organization and principal accounting policies - Additional information (Details) $ in Millions			3 Months Ended		9 Months Ended
	Nov. 17, 2021 USD ($)	Mar. 29, 2021 USD ($)	Oct. 30, 2021 USD ($)	May 01, 2021 USD ($)	Oct. 30, 2021 USD ($) Reporting_Segment	Oct. 31, 2020 USD ($)
Business Acquisition [Line Items]
Number of reportable segments (segment) \| Reporting_Segment					3
Acquisition, net of cash acquired					$ 14.6	$ 0.0
Reportable segments \| North America
Business Acquisition [Line Items]
Acquisition and integration related costs					1.1
Rocksbox
Business Acquisition [Line Items]
Acquisition, net of cash acquired		$ 14.6
Acquisition and integration related costs				$ 1.1
Diamonds Direct USA Inc. \| Reportable segments \| North America
Business Acquisition [Line Items]
Acquisition and integration related costs			$ 2.6		$ 2.6
Diamonds Direct USA Inc. \| Subsequent Event
Business Acquisition [Line Items]
Acquisition, net of cash acquired	$ 504.6
Percentage of voting interests acquired	100.00%
Minimum
Business Acquisition [Line Items]
Seasonal revenues, fourth quarter sales, percent					35.00%
Maximum
Business Acquisition [Line Items]
Seasonal revenues, fourth quarter sales, percent					40.00%