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Income taxes - Narrative (Details) $ in Millions | 3 Months Ended
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May 02, 2020 USD ($)
Income Tax Disclosure [Abstract] |
CARES Act, income tax benefit on Tax Cuts and Jobs Act | $ 67.5
CARES Act, income tax benefit on net operating losses | 48.5
Increase in valuation allowance | $ 56.7

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- Definition CARES Act, Income Tax Expense (Benefit) on Net Operating Losses + References No definition available. + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318 + Details
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