FAIR VALUE MEASUREMENTS, Fair value of assets and liabilities measured on a recurring basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jul. 31, 2016	Oct. 31, 2015
Assets Short - term
Cash equivalents (money market funds)	$ 1,398	$ 1,411
Derivative instruments (foreign exchange contracts)	5	4
Assets, Long-term
Trading securities	31	35
Total assets measured at fair value	1,434	1,450
Liabilities, Short-term
Derivative instruments (foreign exchange and interest rate swap contracts)	22	5
Liabilities Long-term
Deferred compensation liability	31	35
Total liabilities measured at fair value	53	40
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets Short - term
Cash equivalents (money market funds)	1,398	1,411
Derivative instruments (foreign exchange contracts)	0	0
Assets, Long-term
Trading securities	31	35
Total assets measured at fair value	1,429	1,446
Liabilities, Short-term
Derivative instruments (foreign exchange and interest rate swap contracts)	0	0
Liabilities Long-term
Deferred compensation liability	0	0
Total liabilities measured at fair value	0	0
Significant Other Observable Inputs (Level 2)
Assets Short - term
Cash equivalents (money market funds)	0	0
Derivative instruments (foreign exchange contracts)	5	4
Assets, Long-term
Trading securities	0	0
Total assets measured at fair value	5	4
Liabilities, Short-term
Derivative instruments (foreign exchange and interest rate swap contracts)	22	5
Liabilities Long-term
Deferred compensation liability	31	35
Total liabilities measured at fair value	53	40
Significant Unobservable Inputs (Level 3)
Assets Short - term
Cash equivalents (money market funds)	0	0
Derivative instruments (foreign exchange contracts)	0	0
Assets, Long-term
Trading securities	0	0
Total assets measured at fair value	0	0
Liabilities, Short-term
Derivative instruments (foreign exchange and interest rate swap contracts)	0	0
Liabilities Long-term
Deferred compensation liability	0	0
Total liabilities measured at fair value	$ 0	$ 0