Taxes on Earnings - Deferred Tax Asset Valuation Allowance (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Valuation Allowance [Line Items]
Valuation allowance for deferred tax assets	$ 6,994	$ 7,592	$ 7,749	$ 7,951
Decrease in valuation allowances	598	157	202
Deferred tax asset valuation allowance
Valuation Allowance [Line Items]
Valuation allowance for deferred tax assets	$ 7,000	$ 7,600	$ 7,700