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Retirement and Post-Retirement Benefit Plans (Details 6) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2018 | Oct. 31, 2017
Post-Retirement Benefit Plans |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | $ 50 | $ 47
Actual return on plan assets: |  |
Fair value—end of year(3) | 52 | 50
Future Contributions and Funding Policy |  |
Employer contributions | 6 | 4
Expected contribution to defined benefit plans in fiscal 2018 | 6 |
Future benefits payable for the retirement and post-retirement plans |  |
2019 | 9 |
2020 | 10 |
2021 | 10 |
2022 | 10 |
2023 | 11 |
Next five fiscal years to October 31, 2028 | 59 |
Post-Retirement Benefit Plans | Discontinued Operations |  |
Future Contributions and Funding Policy |  |
Employer contributions | 6 |
Non-U.S. Plans | Defined Benefit Plans |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 12,610 | 11,989
Actual return on plan assets: |  |
Fair value—end of year(3) | $ 12,167 | $ 12,610
2018 Target Allocation | 100.00% |
Plan Assets | 100.00% | 100.00%
Future Contributions and Funding Policy |  |
Employer contributions | $ 158 | $ 266
Expected contribution to defined benefit plans in fiscal 2018 | 190 |
Future benefits payable for the retirement and post-retirement plans |  |
2019 | 453 |
2020 | 427 |
2021 | 449 |
2022 | 469 |
2023 | 492 |
Next five fiscal years to October 31, 2028 | 2,704 |
Non-U.S. Plans | Defined Benefit Plans | Discontinued Operations |  |
Future Contributions and Funding Policy |  |
Employer contributions | 200 |
Non-U.S. Plans | Defined Benefit Plans | Private Equity |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 40 |
Actual return on plan assets: |  |
Fair value—end of year(3) | $ 42 | $ 40
Plan Assets | 18.70% | 25.70%
Non-U.S. Plans | Defined Benefit Plans | Hybrids |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | $ 492 |
Actual return on plan assets: |  |
Fair value—end of year(3) | 1,346 | $ 492
Non-U.S. Plans | Defined Benefit Plans | Hedge Funds |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 63 |
Actual return on plan assets: |  |
Fair value—end of year(3) | 45 | 63
Non-U.S. Plans | Defined Benefit Plans | Real Estate Funds |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 253 |
Actual return on plan assets: |  |
Fair value—end of year(3) | $ 229 | $ 253
Plan Assets | 4.20% | 3.30%
Non-U.S. Plans | Defined Benefit Plans | Insurance Group Annuities |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | $ 87 |
Actual return on plan assets: |  |
Fair value—end of year(3) | 97 | $ 87
Non-U.S. Plans | Defined Benefit Plans | Other |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 166 |
Actual return on plan assets: |  |
Fair value—end of year(3) | $ 290 | $ 166
Non-U.S. Plans | Defined Benefit Plans | Public equity securities |  |
Actual return on plan assets: |  |
Plan Assets | 28.70% | 33.80%
Non-U.S. Plans | Defined Benefit Plans | Equity-related investments |  |
Actual return on plan assets: |  |
2018 Target Allocation | 56.30% |
Plan Assets | 51.60% | 62.80%
Non-U.S. Plans | Defined Benefit Plans | Debt securities |  |
Actual return on plan assets: |  |
2018 Target Allocation | 41.90% |
Plan Assets | 44.90% | 32.90%
Non-U.S. Plans | Defined Benefit Plans | Cash and cash equivalents |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | $ 547 |
Actual return on plan assets: |  |
Fair value—end of year(3) | $ 423 | $ 547
2018 Target Allocation | 1.80% |
Plan Assets | 3.50% | 4.30%
Non-U.S. Plans | Level 3 | Defined Benefit Plans |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | $ 143 | $ 129
Actual return on plan assets: |  |
Relating to assets held at the reporting date | 1 | (24)
Relating to assets sold during the period | 5 | 1
Purchases, sales, and settlements | 99 | 28
Transfers in and/or out of Level 3 | 0 | 9
Fair value—end of year(3) | 248 | 143
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Private Equity |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 33 | 32
Actual return on plan assets: |  |
Relating to assets held at the reporting date | 6 | 0
Relating to assets sold during the period | 5 | 1
Purchases, sales, and settlements | (4) | 0
Transfers in and/or out of Level 3 | 0 | 0
Fair value—end of year(3) | 40 | 33
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Hybrids |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 0 |
Actual return on plan assets: |  |
Relating to assets held at the reporting date | 2 |
Relating to assets sold during the period | 0 |
Purchases, sales, and settlements | 130 |
Transfers in and/or out of Level 3 | 0 |
Fair value—end of year(3) | 132 | 0
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Hedge Funds |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 0 |
Actual return on plan assets: |  |
Fair value—end of year(3) | 0 | 0
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Real Estate Funds |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 57 | 26
Actual return on plan assets: |  |
Relating to assets held at the reporting date | 0 | 3
Relating to assets sold during the period | 0 | 0
Purchases, sales, and settlements | (20) | 0
Transfers in and/or out of Level 3 | 0 | 28
Fair value—end of year(3) | 37 | 57
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Insurance Group Annuities |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 52 | 63
Actual return on plan assets: |  |
Relating to assets held at the reporting date | (7) | (39)
Relating to assets sold during the period | 0 | 0
Purchases, sales, and settlements | (7) | 0
Transfers in and/or out of Level 3 | 0 | 28
Fair value—end of year(3) | 38 | 52
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Other |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 1 | 8
Actual return on plan assets: |  |
Relating to assets held at the reporting date | 0 | 12
Relating to assets sold during the period | 0 | 0
Purchases, sales, and settlements | 0 | 28
Transfers in and/or out of Level 3 | 0 | (47)
Fair value—end of year(3) | 1 | 1
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Cash and cash equivalents |  |
Changes in fair value measurements of Level 3 investments |  |
Fair value—beginning of year | 0 |
Actual return on plan assets: |  |
Fair value—end of year(3) | 0 | $ 0
U.S. non-qualified plan participants | U.S. Plans |  |
Future Contributions and Funding Policy |  |
Expected contribution to defined benefit plans in fiscal 2018 | $ 1 |

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