Taxes on Earnings - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Income Tax Disclosure [Abstract]
Deferred tax assets	$ 2,025	$ 1,778
Deferred tax liabilities	(384)	(290)
Deferred tax assets net of deferred tax liabilities	$ 1,641	$ 1,488