REVENUE - Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Oct. 31, 2019
Contract Assets
Contract Assets (Unbilled Accounts Receivable)	$ 131		$ 110
Increase in Contract Asset Balance	21
Contract Liabilities
Contract liability ending balance as of October 31, 2019	386
Net revenue deferred in the period	180
Revenue recognized that was included in the contract liability balance at the beginning of the period	(142)	$ (125)
Change in deferrals from customer cash advances, net of revenue recognized	9
Currency Translation and Other Adjustment	(1)
Contract liability ending balance as of Jan 31, 2020	432
Transaction Price Allocated to Remaining Performance Obligation
Remaining Performance Obligation, Amount	$ 210
Majority of Remaining Performance Obligation Expected Timing of Satisfaction, Period	12 months