Basis of Presentation Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Nov. 03, 2018	Nov. 03, 2018	Feb. 04, 2018
Deferred Revenue Arrangement [Line Items]
Unearned Revenue Liability	$ 41.6	$ 41.6	$ 38.7
Effect on Unearned Revenue Liabilities from New Accounting Principal in Period of Adoption			$ 6.2
Amounts included in unearned revenue liability at the beginning of the period	$ 19.9	$ 61.2