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Revenue recognition - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
May 02, 2020 | May 04, 2019
Extended Service Plans and Lifetime Warranty Agreements |  |
Disaggregation of Revenue [Line Items] |  |
Capitalized contract cost, amortization | $ 4.3 | $ 7.5
North America | Extended Service Plans and Lifetime Warranty Agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, performance obligation, description of timing | 17 years |
North America | Jewelry Replacement Plan |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, performance obligation, description of timing | three years |

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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Balance Type: | debit
Period Type: | duration

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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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- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045 + Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |