DERIVATIVE INSTRUMENTS (Details 2) (Interest Rate Contracts, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014 Fair Value Hedges Member	Oct. 31, 2013 Fair Value Hedges Member	Jul. 31, 2013 Fair Value Hedges Member
Fair Value Hedges
Notional amount of interest rate fair value hedge derivatives					$ 8,847	$ 7,380	$ 7,554
Losses on ineffective portion of interest rate fair value hedge derivatives	(1)	(2)	(2)	0
Gain (Loss) on Fair Value Hedges
Gains (losses) on interest rate contracts	32	(290)	(49)	(293)
Net accrued interest income on interest rate contracts	44	39	121	118
Gains (losses) on borrowings	(33)	288	47	293
Accrued interest expense on borrowings	$ 69	$ 64	$ 194	$ 199