Earnings per Share and Stock-Based Compensation - Changes in Restricted Stock (Detail)	3 Months Ended
	Jan. 31, 2013
Schedule Of Restricted Stock Granted [Line Items]
Outstanding shares, beginning balance	12,325,499
Granted
Forfeited	977,572
Outstanding shares, ending balance	10,521,633
Restricted Stock [Member]
Schedule Of Restricted Stock Granted [Line Items]
Outstanding shares, beginning balance	801,667
Granted
Vested
Forfeited
Outstanding shares, ending balance	801,667