Retirement and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Oct. 31, 2015 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Shared plans | |||
| Defined benefit plans | |||
| Shared plan contribution | $ 518 | $ 277 | |
| Non-U.S. Defined Benefit Plans | |||
| Defined benefit plans | |||
| Plan assets | $ 11,700 | 11,700 | |
| Projected Benefit Obligation | 11,900 | ||
| Recognized accumulated comprehensive loss | 2,600 | 2,600 | |
| Defined benefit plan accumulated other comprehensive loss on transfer | 553 | ||
| Post-Retirement Benefit Plans | |||
| Defined benefit plans | |||
| Recognized credits | 28 | $ 18 | |
| Post-retirement benefit plan obligation transferred from Parent | 150 | 150 | |
| Post-retirement benefit plan asset transferred from Parent | 40 | 40 | |
| Recognized accumulated other comprehensive income transferred from parent | $ 10 | $ 10 | |