Asset Impairments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 01, 2020	Feb. 02, 2019	Feb. 01, 2020	Feb. 02, 2019
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of tangible assets			$ 1.8	$ 4.5
Tangible Asset Impairment Charges, Continuing Operations	$ 1.1	$ 1.8	1.8	2.0
Premium Fashion
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of tangible assets	0.0	0.3	0.2	0.4
Plus Fashion
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of tangible assets	0.3	1.1	0.5	1.1
Kids Fashion
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of tangible assets	$ 0.8	$ 0.4	$ 1.1	$ 0.5