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Revenue recognition - Rollforward (Details) - Sterling Jewelers - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 04, 2018 | Jul. 29, 2017 | Aug. 04, 2018 | Jul. 29, 2017
Movement in Deferred Revenue [Roll Forward] |  |  |  |
ESP deferred revenue, beginning of period | $ 913.5 | $ 903.7 | $ 916.1 | $ 905.6
Plans sold | 90.9 | 96.8 | 186.9 | 193.4
Revenue recognized | (97.8) | (98.3) | (196.4) | (196.8)
ESP deferred revenue, end of period | $ 906.6 | $ 902.2 | $ 906.6 | $ 902.2

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- Definition Product Warranty, Revenues Recognized + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of increase in the standard and extended product warranty accrual from warranties issued. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Details
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