Retirement and Post-Retirement Benefit Plans - Direct Defined Benefit Plans with Projected Benefit Obligations Exceeding the Fair Value of Plan Assets (Details) - Defined Benefit Plans - USD ($) $ in Millions	Oct. 31, 2023	Oct. 31, 2022
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Aggregate fair value of plan assets	$ 1,969	$ 1,907
Aggregate projected benefit obligation	$ 2,765	$ 2,795