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Income taxes (Tables) | 6 Months Ended
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Aug. 03, 2019
Income Tax Disclosure [Abstract] |
Reconciliation Of Effective Tax Rate |
| 26 weeks ended
| August 3, 2019 |  | August 4, 2018
Estimated annual effective tax rate before discrete items(1) | 13.7 | % |  | 32.2 | %
Discrete items recognized | (19.0 | )% |  | (12.2 | )%
Effective tax rate recognized in statement of operations | (5.3 | )% |  | 20.0 | %
(1) Fiscal 2019 effective tax rate computed based on actual tax rate for the 26 weeks ended August 4, 2018.

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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