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DERIVATIVE INSTRUMENTS (Details 2) (Interest Rate Contracts, USD $)
In Millions, unless otherwise specified
3 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2014
Fair Value Hedges Member
Oct. 31, 2013
Fair Value Hedges Member
Jan. 31, 2013
Fair Value Hedges Member
Fair Value Hedges          
Notional amount of interest rate fair value hedge derivatives     $ 8,185 $ 7,380 $ 9,025
Gains (losses) on ineffective portion of interest rate fair value hedge derivatives (2) 2      
Gain (Loss) on Fair Value Hedges          
Gains (losses) on interest rate contracts (69) (73)      
Net accrued interest income on interest rate contracts 36 38      
Gains (losses) on borrowings 67 75      
Accrued interest expense on borrowings $ 59 $ 67