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Common Stock and Stockholders' Equity - PRSU's (Detail) - Vesting March 15 2018 - All Other Employees - Performance Based Restricted Stock Unit PRSU shares in Millions, $ in Millions | 3 Months Ended
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Apr. 30, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
RSUs granted, number of Shares | shares | 0.4
Compensation related cost | $ | $ 7

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- Definition The number of grants made 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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- Definition Amount of capitalized and expensed compensation cost from equity-based compensation arrangements. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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