Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	May 02, 2020	May 04, 2019	Feb. 01, 2020
Operating Loss Carryforwards [Line Items]
Effective income tax rate (as a percent)	14.10%	11.70%
Tax benefit due to deferred tax rate change related to net operating loss carrybacks	$ 11.8
Valuation allowance due to cumulative net operating losses	3.7
Aggregate accruals for uncertain tax positions, including penalties and interest	34.6		$ 34.0
Other long-term liabilities
Operating Loss Carryforwards [Line Items]
Transition tax liability	$ 19.9		$ 19.9