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Repurchase of Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 29, 2017 | Jul. 30, 2016 | Jul. 29, 2017 | Jul. 30, 2016
Open market [Domain] |  |  |  |  |
Stock Repurchases [Line Items] |  |  |  |  |
Stock Repurchased and Retired During Period, Value | [1] | $ 397 | $ 221 | $ 781 | $ 277
Average share price |  | $ 55.07 | $ 30.65 | $ 50.38 | $ 30.98
Stock Repurchased and Retired During Period, Shares | [1] | 7.2 | 7.2 | 15.5 | 8.9
Unsettled shares, cost |  | $ 18 | $ 6 | $ 18 | $ 6
Unsettled shares, shares |  | 0.3 | 0.2 | 0.3 | 0.2
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 |  | $ 397 | $ 221 | $ 781 | $ 322
Average share price |  | $ 55.07 | $ 30.65 | $ 50.38 | $ 30.62
Stock Repurchased and Retired During Period, Shares |  | 7.2 | 7.2 | 15.5 | 10.5
[1] | As of July 29, 2017, $18 million, or 0.3 million shares, in trades remained unsettled. As of July 30, 2016, $6 million, or 0.2 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.

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