Share Repurchase - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Nov. 03, 2018	Feb. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017	Feb. 03, 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired				$ 1,453,000,000		$ 1,027,000,000
Number of shares purchased	6.3		0.2	19.0	10.8
Total investment	$ 526,000,000		$ 10,000,000	$ 1,451,000,000	$ 611,000,000
Share Repurchase Program 2017
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount	5,000,000,000		5,000,000,000	5,000,000,000	5,000,000,000
Prepaid repurchase amount	$ 450,000,000		$ 250,000,000		139,000,000	$ 161,000,000
Repurchase of stock (in shares)	(3.5)	(0.3)	(2.5)			(2.8)
Settlement of purchase agreement		$ 89,000,000				$ 89,000,000
Stock repurchased and retired	$ 287,000,000
Shares receivable	163,000,000			163,000,000
Price paid per share (in dollars per share)						$ 57.78
Share Repurchase Program 2017 | Minimum
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount	325,000,000		$ 150,000,000	325,000,000	150,000,000
Share Repurchase Program 2017 | Maximum
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount	$ 450,000,000		$ 250,000,000	$ 450,000,000	$ 250,000,000