Supplementary Financial Information - Schedule of Net Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Disaggregation of Revenue [Line Items]
Total net revenue	$ 13,220	$ 12,800	$ 26,724	$ 25,985
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	5,793	5,591	11,312	10,999
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	4,393	4,373	9,147	9,041
Asia-Pacific and Japan
Disaggregation of Revenue [Line Items]
Total net revenue	$ 3,034	$ 2,836	$ 6,265	$ 5,945