Taxes on Earnings - Schedule of Deferred Tax Assets for Net Operating Loss Carryforwards (Details) - USD ($) $ in Millions	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Operating Loss Carryforwards [Line Items]
Gross NOLs	$ 28,919
Valuation allowance	(7,592)	$ (7,749)	$ (7,976)	$ (7,930)
Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	7,454
Valuation allowance	(7,195)
Federal
Operating Loss Carryforwards [Line Items]
Gross NOLs	291
Federal | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	63
Valuation allowance	(11)
State
Operating Loss Carryforwards [Line Items]
Gross NOLs	2,680
State | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	178
Valuation allowance	(71)
Foreign
Operating Loss Carryforwards [Line Items]
Gross NOLs	25,948
Foreign | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Deferred Taxes on NOLs	7,213
Valuation allowance	$ (7,113)