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Share-Based Compensation - Summary of the Activity for Unvested Stock Option Awards (Details) - $ / shares shares in Thousands | 12 Months Ended
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Jan. 26, 2020 | Jan. 27, 2019 | Jan. 28, 2018
Number of Shares |  |  |
Options granted (in shares) | 0 |  |
Weighted Average Exercise Price (per share) |  |  |
Beginning balance (in dollars per share) | $ 29.03 |  |
Options granted (in dollars per share) | 0 |  |
Options forfeited (in dollars per share) | 41.71 |  |
Ending balance (in dollars per share) | $ 30.26 | $ 29.03 |
Weighted Average Grant Date Fair Value (per share) |  |  |
Options granted (in dollars per share) |  | $ 14.53 | $ 10.70
Unvested Stock Options Award |  |  |
Number of Shares |  |  |
Beginning balance (in shares) | 400 |  |
Options granted (in shares) | 0 |  |
Options vested (in shares) | (193) |  |
Options forfeited (in shares) | (11) |  |
Ending balance (in shares) | 196 | 400 |
Weighted Average Exercise Price (per share) |  |  |
Beginning balance (in dollars per share) | $ 34.52 |  |
Options granted (in dollars per share) | 0 |  |
Options vested (in dollars per share) | 27.40 |  |
Options forfeited (in dollars per share) | 42.44 |  |
Ending balance (in dollars per share) | 41.14 | $ 34.52 |
Weighted Average Grant Date Fair Value (per share) |  |  |
Beginning balance (in dollars per share) | 10.07 |  |
Options granted (in dollars per share) | 0 |  |
Options vested (in dollars per share) | 7.86 |  |
Options forfeited (in dollars per share) | 12.50 |  |
Ending balance (in dollars per share) | $ 12.13 | $ 10.07 |

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- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested in Period, Weighted Average Exercise Price + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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