Stockholders' Equity - Schedule Of Changes In Restricted Stock Units (Detail)	1 Months Ended	12 Months Ended
	May 18, 2010	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Schedule Of Restricted Stock Granted [Line Items]
Outstanding, beg. of year		13,399,381	12,731,430	15,909,101
Granted		375,000	2,315,000	4,403,407
Forfeited	(1,696,345)	(942,553)	(889,511)	(6,868,016)
Outstanding, end of year		12,325,499	13,399,381	12,731,430
Restricted Stock Unit [Member]
Schedule Of Restricted Stock Granted [Line Items]
Outstanding, beg. of year		1,911,669	2,842,004	1,022,003
Granted		105,000	120,000	3,110,000
Vested		(1,155,002)	(1,050,335)	(1,229,998)
Forfeited		(60,000)		(60,001)
Outstanding, end of year		801,667	1,911,669	2,842,004