Business and Summary of Accounting Policies Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ 0	$ 11	$ 8
Beginning Balance	5,991	5,978	6,048
Ending Balance	5,491	5,991	5,978
Unrealized Gains Losses on Investments
Beginning Balance	0	(11)
Other comprehensive income	0	11
Ending Balance	0	0	(11)
Loss On Interest Rate Derivatives
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	3	3
Beginning Balance	(20)	(23)
Ending Balance	(17)	(20)	(23)
Accumulated Other Comprehensive (Loss)
Beginning Balance	(20)	(34)	(45)
Other comprehensive income	3	14
Ending Balance	$ (17)	$ (20)	$ (34)