Fair Value Measurements and Concentrations of Credit Risk (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Carrying value of long-lived assets held and used	$ 201	$ 41
Long-lived assets held and used	53	8
Impairments of properties held and used	$ 148	$ 33	$ 39