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Subsequent Event (Details) | 103 Months Ended |
--- | --- | ---
Jul. 31, 2011 | Sep. 22, 2011
Subsequent Events [Abstract] |  |
Share increase in the Company's stock repurchase program (in shares) |  | 20,000,000
Total current authorization of stock repurchase program (in shares) |  | 49,000,000
Shares repurchased under the scheme (in shares) | 20,453,037 |
Shares available for repurchase under the program (in shares) |  | 28,546,963
Subsequent Event, Date | Sep. 22, 2011 |

X
- Definition The amount authorized increased by an entity's Board of Directors understock repurchase program. + Details
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Balance Type: | na
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- Definition The number of shares available for repurchase under stock repurchase program. + Details
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- Definition The number of shares repurchsed under a stock repurchase plan. + Details
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + Details
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- Details
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- Definition Date of subsequent event occurrence or of indication that subsequent event occurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 + Details
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