Earnings Per Share - Summarization of Company's Class A and Class B Common and Treasury Shares (Detail) - shares	Apr. 30, 2017	Oct. 31, 2016
Class A Common Stock
Class of Stock [Line Items]
Authorized Shares (shares)	128,000,000	128,000,000
Issued Shares (shares)	42,281,920	42,281,920
Outstanding Shares (shares)	25,830,419	25,781,791
Treasury shares (in shares)	16,451,501	16,500,129
Class B Common Stock
Class of Stock [Line Items]
Authorized Shares (shares)	69,120,000	69,120,000
Issued Shares (shares)	34,560,000	34,560,000
Outstanding Shares (shares)	22,009,725	22,009,725
Treasury shares (in shares)	12,550,275	12,550,275