Retirement and Post-Retirement Benefit Plans - Future Contributions and Funding Policy (Narrative) (Details) $ in Millions	Oct. 31, 2019 USD ($)
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 6
U.S. | Defined Benefit Plans | Nonqualified plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	36
Non-U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 76