Share Repurchase - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						6 Months Ended
	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Aug. 03, 2019	Nov. 03, 2018	Aug. 04, 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchased (in shares)	4.3				5.8		7.9		12.7
Stock repurchased and retired	$ (59)	$ 277	$ 167	$ 2	$ 7	$ 494
Share Repurchase Program 2017
Equity, Class of Treasury Stock [Line Items]
Stock repurchased (in shares)							4.2	4.8
Prepaid repurchase amount							$ 340	$ 400
Price paid per share (in dollars per share)								$ 83.88
Authorized shares for accelerated stock repurchase, low end					400				$ 400
Authorized shares for accelerated stock repurchase, high end					525				525
Settlement of purchase agreement				$ 125	$ 525			$ 125	525
Repurchased and retired stock (in shares)				0.2	4.6
Stock repurchased and retired					$ 355
Shares receivable					$ 170				$ 170