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Summary of Information about Stock Options Activity (Parenthetical) (Detail) In Millions | 1 Months Ended
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Jul. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted options, issuance of new shares | 18

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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. + Details
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Period Type: | duration

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- Definition The quantity of shares issuable on stock options awarded under the plan during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(d) + Details
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