Employee Retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 29, 2016	Jan. 30, 2015	Jan. 31, 2014
Employee Retirement Plans
Contribution percentage for employees automatically enrolled in the 401k plan hired prior to November 1, 2012	1.00%
Maximum company match	4.25%
Service requirement to receive company match	6 months
Employee retirement plan expense	$ 155	$ 154	$ 160