Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2015	Oct. 28, 2016	Jan. 29, 2016
Income Tax Examination [Line Items]
Unrecognized tax benefits		$ 8.3
Unrecognized tax benefits, if recognized, would impact effective tax rate		5.4
Amount of interest and penalties recognized		6.4
Amount of interest and penalties recognized, net of federal benefit		4.2
Tax Adjustments, Settlements, and Unusual Provisions	$ 1.2
Sears Holdings Corporation | Other assets
Income Tax Examination [Line Items]
Indemnification receivable, uncertain tax positions	$ 13.5	$ 14.4	$ 13.7