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Income taxes - Summary of Activity of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jan. 30, 2021 | Feb. 01, 2020 | Feb. 02, 2019
Reconciliation of Unrecognized Tax Benefits |  |  |
Unrecognized tax benefits, beginning of period | $ 23.5 | $ 18.1 | $ 12.0
Increases related to current year tax positions | 1.0 | 2.0 | 2.5
Increases related to prior year tax positions | 3.4 | 6.0 | 6.2
Lapse of statute of limitations | (2.6) | (2.6) | (2.4)
Difference on foreign currency translation | 0.1 |  |
Difference on foreign currency translation |  | 0.0 | (0.2)
Unrecognized tax benefits, end of period | $ 25.4 | $ 23.5 | $ 18.1

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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