Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	May 04, 2018	Apr. 28, 2017	Feb. 02, 2018
Income Tax Examination [Line Items]
Effective tax rate	68.10%	35.20%
Unrecognized tax benefits	$ 1.9
Unrecognized tax benefits, if recognized, would impact effective tax rate	1.5
Sears Holdings Corporation | Other assets
Income Tax Examination [Line Items]
Indemnification receivable, uncertain tax positions	$ 2.5	$ 11.6	$ 7.4