Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	5.30%	57.20%	(77.90%)	1.90%
Income tax benefit related to the carryback of the 2019 federal net operating loss to prior periods pursuant to the CARES Act			$ 12.3
Income tax benefit related to the carryback of the projected fiscal 2020 loss to years with a 35% statutory tax rate			2.0
Valuation allowance for deferred tax assets			$ 3.0	$ 11.3
Statutory tax rate			35.00%