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RESTRUCTURING AND OTHER RELATED COSTS - ROLLFORWARD (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Apr. 30, 2026	Jan. 31, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Restructuring Cost and Reserve [Line Items]
Income statement expense	$ 8		$ 56	$ 28	$ 57
FY25 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense since inception	109			109
Employee Severance \| FY25 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	16	$ 18		18
Income statement expense	8	20		28
Restructuring Reserve, Settled without Cash	(3)	(3)
Payments for Restructuring	(16)	(19)
Restructuring Reserve, Ending Balance	$ 5	$ 16		$ 5
Employee Severance \| FY24 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Income statement expense					$ 1