Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 28, 2018	Oct. 28, 2018	Jan. 28, 2018
Income Tax Disclosure [Abstract]
Statutory federal income tax rate		21.00%
Reduction to the provisional tax expense for the Transition Tax	$ 4.7
Increase (decrease) In global tax rate, percent		10.50%
Income tax benefit		$ 15.8
Percentage of uncertain tax positions evaluating criteria		50.00%
Net tax benefits, if recognized, would impact the effective tax rate	$ 5.7	$ 5.7	$ 3.9