Earnings per Share and Stock-Based Compensation - Changes in Restricted Stock (Detail)	6 Months Ended
	Apr. 30, 2013
Schedule Of Restricted Stock Granted [Line Items]
Outstanding shares, beginning balance	12,325,499
Granted	150,000
Forfeited	(1,376,505)
Outstanding shares, ending balance	10,052,866
Restricted Stock [Member]
Schedule Of Restricted Stock Granted [Line Items]
Outstanding shares, beginning balance	801,667
Granted	90,000
Vested	(680,000)
Forfeited	(26,667)
Outstanding shares, ending balance	185,000