MARKETABLE SECURITIES (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Contractual Maturities of Debt Securities, Amortized Cost
Amortized cost, due in one year or less	$ 1,016
Amortized cost, due after one through five years	273
Amortized cost, due after five through 10 years	128
Amortized cost, due after 10 years	61
Amortized cost, mortgage-backed securities	121
Amortized cost, Debt securities	1,599	1,445
Contractual Maturities of Debt Securities, Fair Value
Fair value, due in one year or less	1,016
Fair value, due after one through five years	278
Fair value, due after five through 10 years	130
Fair value, due after 10 years	62
Fair value, mortgage-backed securities	119
Fair value, Debt Securities	1,605	1,470
Proceeds from the sales of available-for-sale securities	7	7	2
Losses related to impairment write-downs	$ 0