Revenues (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	May 04, 2019	May 05, 2018
Increase due to purchases [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 5.2	$ 5.9
Decrease due to expirations and redemptions [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 4.1	5.5
Increase due to topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Liability, Revenue Recognized		$ 6.4