Repurchase of Common Stock Authorized Common Stock Repurchases (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 29, 2017	Feb. 27, 2017	Jun. 30, 2011
February 2017 share repurchase program [Member]
Authorized Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount		$ 5,000
Stock Repurchased and Retired During Period, Shares	7.4
Stock Repurchased and Retired During Period, Value	$ 346
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 4,700
June 2011 share repurchase program [Member}
Authorized Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount			$ 5,000
Stock Repurchased and Retired During Period, Shares	0.9
Stock Repurchased and Retired During Period, Value	$ 38