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Income Taxes - Projected Effective Tax Rate for Periods (Detail)
3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Income Tax Disclosure [Abstract]        
Effective tax rates for income from continuing operations 9.10% 99.40% 5.80% 48.60%