Taxes on Earnings - Schedule of Deferred Tax Assets for Net Operating Loss Carryforwards (Details) - USD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (6,479)	$ (6,688)	$ (6,994)	$ (7,592)
Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Gross NOLs	25,984
Deferred Taxes on NOLs	6,575
Valuation allowance	(6,051)
Federal | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Gross NOLs	33
Deferred Taxes on NOLs	7
Valuation allowance	(1)
State | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Gross NOLs	1,817
Deferred Taxes on NOLs	97
Valuation allowance	(23)
Foreign | Operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Gross NOLs	24,134
Deferred Taxes on NOLs	6,471
Valuation allowance	$ (6,027)