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Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Apr. 27, 2018 shares | Oct. 05, 2016 shares | Apr. 29, 2018 USD ($) employee $ / shares shares | Oct. 28, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Maximum number of shares subject to purchase under warrants |  | 1,086,957 |  |
Warrants vested (in shares) | 586,956 |  |  |
Warrant vesting costs | $ |  |  |  | $ 21.5
Warrant vesting costs due to acceleration | $ |  |  |  | $ 15.9
Number of securities called by warrants (in shares) |  |  |  | 869,565
Document Fiscal Year Focus |  |  |  | 2019
Number of shares affected (in shares) |  |  | 159,000 |
Number of employees affected | employee |  |  | 8 |
Additional compensation cost | $ |  |  | $ 2.8 |
Market Performance-based RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity awards granted |  |  | 200,442 |
Description of award vesting rights |  |  | one-third of the awards vesting each performance period |
Performance Period One | Market Performance-based RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance period |  |  | 1 year |
Grant date fair value per unit | $ / shares |  |  | $ 33.02 |
Performance Period Two | Market Performance-based RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance period |  |  | 2 years |
Grant date fair value per unit | $ / shares |  |  | $ 34.85 |
Performance Period Three | Market Performance-based RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance period |  |  | 3 years |
Grant date fair value per unit | $ / shares |  |  | $ 36.52 |

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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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