Repurchase of Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
		Nov. 30, 2017	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Total Share Repurchases [Domain]
Stock Repurchases [Line Items]
Stock Repurchased and Retired During Period, Value		$ 256
Stock Repurchased and Retired During Period, Shares		4.5
Open market [Domain]
Stock Repurchases [Line Items]
Stock Repurchased and Retired During Period, Value	[1]		$ 366	$ 206	$ 1,147	$ 483
Average share price			$ 57.14	$ 37.67	$ 52.35	$ 33.52
Stock Repurchased and Retired During Period, Shares	[1]		6.4	5.5	21.9	14.4
Unsettled shares, cost			$ 17	$ 11	$ 17	$ 11
Unsettled shares, shares			0.3	0.3	0.3	0.3
January 2016 ASR [Domain]
Stock Repurchases [Line Items]
Stock Repurchased and Retired During Period, Value	[2]		$ 0	$ 0	$ 0	$ 45
Average share price	[2]		$ 0.00	$ 0.00	$ 0.00	$ 28.55
Stock Repurchased and Retired During Period, Shares	[2]		0.0	0.0	0.0	1.6
Total Share Repurchases [Domain]
Stock Repurchases [Line Items]
Stock Repurchased and Retired During Period, Value			$ 366	$ 206	$ 1,147	$ 528
Average share price			$ 57.14	$ 37.67	$ 52.35	$ 33.03
Stock Repurchased and Retired During Period, Shares			6.4	5.5	21.9	16.0

[1] As of October 28, 2017, $17 million, or 0.3 million shares, in trades remained unsettled. As of October 29, 2016, $11 million, or 0.3 million shares, in trades remained unsettled. The liability for unsettled trades is included in Accrued liabilities in the Condensed Consolidated Balance Sheets.

[2] See Note 7, Shareholders' Equity, in the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended January 28, 2017, for additional information regarding the January 2016 ASR.