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SEGMENT INFORMATION Reconciliation of Reportable Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Total reportable operating segments' income from operations	$ 182	$ 197	$ 487	$ 503
Share-based compensation expense	(19)	(16)	(73)	(66)
Amortization of acquisition-related balances	(54)	(56)	(167)	(164)
Acquisition and integration costs	(8)	(3)	(12)	(5)
Northern California wildfire-related costs	0	0	32	0
Restructuring and other	(1)	(3)	(4)	(9)
Income from operations	182	197	487	503
Interest income	1	7	11	17
Interest expense	(20)	(20)	(59)	(60)
Other income (expense), net	22	15	56	52
Income before taxes	185	199	495	512
Operating Segments [Member]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Total reportable operating segments' income from operations	264	275	711	747
Income from operations	$ 264	$ 275	$ 711	$ 747

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