Impairments, Store Closing Costs and Gain on Sale of Leases (Narrative) (Details) - stores	1 Months Ended
	Jan. 28, 2017	Aug. 31, 2016	Jan. 30, 2016	Jan. 31, 2015
Impairments, Store Closing Costs and Other Costs [Abstract]
Number of stores closed	68		40	14
Planned store closings		100