Retirement and Post-Retirement Benefit Plan - Future Contributions and Funding Policy (Narrative) (Details) $ in Millions	Oct. 31, 2017 USD ($)
Defined Benefit Plans | Nonqualified plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 33
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	7
Non-U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 24