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Restructuring and Other Charges - Narrative (Details) employee in Thousands, $ in Millions		3 Months Ended		6 Months Ended
	Nov. 18, 2022 USD ($) employee	Apr. 30, 2023 USD ($)	Apr. 30, 2022 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Other charges		$ 22	$ 4	$ 32	$ 5
Fiscal 2023 Plan \| Labor and Non-Labor Actions
Restructuring Cost and Reserve [Line Items]
Estimated pre-tax charges	$ 1,000
Fiscal 2023 Plan \| Labor Costs
Restructuring Cost and Reserve [Line Items]
Estimated pre-tax charges	$ 700
Minimum \| Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Expected positions to be eliminated \| employee	4
Maximum \| Fiscal 2023 Plan
Restructuring Cost and Reserve [Line Items]
Expected positions to be eliminated \| employee	6