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Stockholders' Equity and Share-Based Awards - Additional Information (Detail) shares in Millions, $ in Millions | 9 Months Ended
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Sep. 30, 2017 USD ($) shares
Performance-Based Restricted Stock Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of stock units awarded | shares | 1.4
Aggregate grant date fair value | $ | $ 65.6
Time-Based RSU's [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of stock units awarded | shares | 0.5
Aggregate grant date fair value | $ | $ 23.4

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- Definition Share based compensation arrangement by share based payment award aggregate grant date fair value. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Details
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