MARKETABLE SECURITIES (Details 2) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Contractual Maturities of Debt Securities, Amortized Cost
Amortized cost, due in one year or less	$ 51
Amortized cost, due after one through five years	88
Amortized cost, due after five through 10 years	99
Amortized cost, due after 10 years	40
Amortized cost, mortgage-backed securities	108
Amortized cost, debt securities	386
Contractual Maturities of Debt Securities, Fair Value
Fair value, due in one year or less	50
Fair value, due after one through five years	91
Fair value, due after five through 10 years	101
Fair value, due after 10 years	42
Fair value, mortgage-backed securities	110
Fair value, debt securities	394
Proceeds from the sales of available-for-sale securities	120	$ 6	$ 7
Losses related to impairment write-downs	$ 0	$ 0	$ 0