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Summary of Significant Accounting Policies - Share Repurchases (Details) - Common Stock shares in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 09, 2016 | Oct. 29, 2017 $ / shares shares | Jan. 29, 2013 shares
Shares Repurchases |  |  |
Authorized stock split ratio | 2 |  |
2013 Program |  |  |
Shares Repurchases |  |  |
Number of shares authorized to be repurchased (in shares) |  |  | 10.0
Stock repurchased (in shares) |  | 2.7 |
Average price of shares repurchased (in dollars per share) | $ / shares |  | $ 34.51 |
Remaining number of shares authorized to be repurchased (in shares) |  | 10.5 |

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