Stock-Based Compensation (Summary of Information about Stock Options Activity) (Parenthetical) (Detail) shares in Millions		1 Months Ended
Apr. 01, 2013	Jul. 31, 2009 shares
Compensation Related Costs [Abstract]
Granted options, issuance of new shares		18
Stock split implemented	10

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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