Income Taxes (Details) - USD ($) $ in Millions	Jul. 31, 2015	Jan. 30, 2015	Aug. 01, 2014	Apr. 04, 2014
Income Tax Examination [Line Items]
Unrecognized tax benefits	$ 9.0			$ 8.7
Unrecognized tax benefits, if recognized, would impact effective tax rate	5.8
Amount of interest and penalties recognized	6.0			5.0
Amount of interest and penalties recognized, net of federal benefit	3.9
Other liabilities
Income Tax Examination [Line Items]
Tax reserve for uncertain tax position	13.7
Sears Holdings Corporation | Deferred tax liabilities
Income Tax Examination [Line Items]
Deferred tax assets	30.4
Sears Holdings Corporation | Other assets
Income Tax Examination [Line Items]
Indemnification receivable, uncertain tax positions	$ 14.6	$ 14.3	$ 13.9	$ 13.7