Restructuring and Other Charges - Schedule of Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 48		$ 539
Fiscal 2026 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	60		547
Other prior-year plans
Restructuring Cost and Reserve [Line Items]
Restructuring costs	(12)		(8)
Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 110		$ 302
Severance \| Fiscal 2026 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	38		200
Severance \| Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		77		218
Non-labor \| Fiscal 2026 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	7		30
Non-labor \| Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		14		34
Special Termination Benefit \| Fiscal 2026 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0		280
Other Charges \| Fiscal 2026 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 15		$ 37
Other Charges \| Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 19		$ 50

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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