Taxes on Earnings - Schedule of Deferred Tax Assets for Net Operating Loss Carryforwards (Details) - USD ($) $ in Millions	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Operating Loss Carryforwards [Line Items]
Gross NOLs	$ 27,311
Valuation allowance	(6,994)	$ (7,592)	$ (7,749)	$ (7,951)
Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	7,048
Valuation allowance	(6,545)
Federal
Operating Loss Carryforwards [Line Items]
Gross NOLs	73
Federal | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	15
Valuation allowance	(4)
State
Operating Loss Carryforwards [Line Items]
Gross NOLs	2,313
State | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	138
Valuation allowance	(47)
Foreign
Operating Loss Carryforwards [Line Items]
Gross NOLs	24,925
Foreign | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	6,895
Valuation allowance	$ (6,494)