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Retirement and Post-Retirement Benefit Plans (Details 3) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Post-Retirement Benefit Plans |  |  |
Net benefit (credit) cost |  |  |
Service cost | $ 1 | $ 3 | $ 3
Interest cost | 7 | 6 | 6
Expected return on plan assets | (1) | (2) | (2)
Amortization and deferrals: |  |  |
Actuarial loss (gain) | (3) | (2) | (3)
Prior service benefit | 0 | 0 | 0
Net periodic benefit cost | 4 | 5 | 4
Curtailment gain | 0 | 0 | 0
Settlement loss | 0 | 0 | 0
Special termination benefits | 0 | 0 | 0
Plan credit allocation | 0 | (1) | (1)
Net benefit cost (credit) from continuing operations | 4 | 4 | 3
Discontinued operations | 0 | 1 | 1
Total net benefit (credit) cost | $ 4 | $ 5 | $ 4
Weighted average assumptions used to calculate net benefit (credit) cost |  |  |
Discount rate used to determine benefit obligation | 4.50% | 4.20% | 4.60%
Discount rate used to determine service cost | 3.70% | 3.70% | 4.60%
Discount rate used to determine interest cost | 4.20% | 3.80% | 4.60%
Expected increase in compensation levels | 0.00% | 0.00% | 0.00%
Expected long-term return on plan assets | 2.60% | 3.10% | 4.00%
Defined Benefit Plans | Non-U.S. Plans |  |  |
Net benefit (credit) cost |  |  |
Service cost | $ 105 | $ 139 | $ 199
Interest cost | 225 | 213 | 317
Expected return on plan assets | (567) | (548) | (667)
Amortization and deferrals: |  |  |
Actuarial loss (gain) | 211 | 264 | 220
Prior service benefit | (17) | (17) | (19)
Net periodic benefit cost | (43) | 51 | 50
Curtailment gain | (1) | (1) | 0
Settlement loss | 20 | 15 | 4
Special termination benefits | 6 | 5 | 5
Plan credit allocation | 0 | (14) | (15)
Net benefit cost (credit) from continuing operations | (18) | 56 | 44
Discontinued operations | 0 | 81 | 92
Total net benefit (credit) cost | $ (18) | $ 137 | $ 136
Weighted average assumptions used to calculate net benefit (credit) cost |  |  |
Discount rate used to determine benefit obligation | 2.00% | 2.00% | 2.70%
Discount rate used to determine service cost | 2.40% | 2.00% | 2.70%
Discount rate used to determine interest cost | 1.70% | 1.80% | 2.70%
Expected increase in compensation levels | 2.30% | 2.40% | 2.30%
Expected long-term return on plan assets | 4.40% | 4.40% | 5.80%

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- Definition The total amount of net periodic benefit cost (credit) for defined benefit plans for the period, before gain or loss due to settlements or curtailments. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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