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Retirement and Post-Retirement Benefit Plans - Summary of Net Benefit Cost (Details) - Benefit Plans - Non-U.S. Defined Benefit Plans - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2018
Jul. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 26 $ 36 $ 79 $ 106
Interest cost 55 53 168 155
Expected return on plan assets (139) (137) (423) (401)
Amortization and deferrals:        
Actuarial loss 52 60 158 200
Prior service benefit (4) (4) (12) (12)
Net periodic benefit (credit) cost (10) 8 (30) 48
Settlement loss 9 6 11 9
Special termination benefits 1 1 5 3
Plan expense allocation 0 (1) 0 (17)
Net benefit (credit) cost from continuing operations 0 14 (14) 43
Discontinued operations 0 3 0 83
Net benefit (credit) cost $ 0 $ 17 $ (14) $ 126