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Earnings Per Share - Summarization of the Company's Class A and Class B Common and Treasury Shares (Detail)	Oct. 31, 2012	Oct. 31, 2011
Class A Common Stock [Member]
Class of Stock [Line Items]
Authorized Shares	128,000,000	128,000,000
Issued Shares	42,281,920	42,281,920
Outstanding Shares	25,283,465	24,972,029
Treasury Shares	16,998,455	17,309,891
Class B Common Stock [Member]
Class of Stock [Line Items]
Authorized Shares	69,120,000	69,120,000
Issued Shares	34,560,000	34,560,000
Outstanding Shares	22,119,966	22,120,966
Treasury Shares	12,440,034	12,439,034

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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