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Revenue recognition - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jan. 30, 2021 | Feb. 01, 2020 | Feb. 02, 2019 | Feb. 03, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Capitalized contract cost reclassified |  | $ (111.3) | $ (103.6) |  |
Shareholders' equity reclassification, adoption of ASU 2014-09 |  | 1,190.3 | 1,222.6 | $ 1,201.6 | $ 2,499.8
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue recognized |  |  |  | 111.2 |
Capitalized contract cost reclassified |  |  |  |  | 16.5
Shareholders' equity reclassification, adoption of ASU 2014-09 | [1] |  |  |  | $ (16.5)
Extended Service Plans and Lifetime Warranty Agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Capitalized contract cost, amortization |  | $ 26.3 | $ 29.5 | $ 52.4 |
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 |  |  |
[1] | Reflects reclassifications to retained earnings related to 1) unrealized gains related to the Company’s equity security investments as of February 3, 2018 from AOCI associated with the adoption of ASU 2016-01 and 2) deferred costs associated with the sale of extended service plans due to the adoption of ASU 2014-09.

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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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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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