Financing Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 02, 2015	May 13, 2015
Stock Repurchased During Period, Shares	5.9
Stock Repurchased During Period, Value	$ 385
Stock Repurchase Program, Remaining Authorized Repurchase Amount	647
Subsequent Event [Member]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		2,147
Stock Repurchase Program, Authorized Amount		$ 1,500