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Organization and principal accounting policies - Additional information (Details) | 9 Months Ended
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Oct. 28, 2017 segment
Property, Plant and Equipment [Line Items] |
Number of reportable segments | 5
Seasonal revenues, first quarter sales, percent | 20.00%
Seasonal revenues, second quarter sales, percent | 20.00%
Seasonal revenues, third quarter sales, percent | 20.00%
Seasonal revenues, fourth quarter sales, percent | 40.00%
UK Jewelry and Zales Jewelry | Minimum |
Property, Plant and Equipment [Line Items] |
Operating income expected in fourth quarter, Percent | 45.00%
UK Jewelry and Zales Jewelry | Maximum |
Property, Plant and Equipment [Line Items] |
Operating income expected in fourth quarter, Percent | 55.00%
Sterling Jewelers | Minimum |
Property, Plant and Equipment [Line Items] |
Operating income expected in fourth quarter, Percent | 40.00%
Sterling Jewelers | Maximum |
Property, Plant and Equipment [Line Items] |
Operating income expected in fourth quarter, Percent | 45.00%

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- Definition Seasonal Revenues, First Quarter Sales, Percent + References No definition available. + Details
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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. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Details
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- Details
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