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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables) | 3 Months Ended
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Jan. 31, 2020
Defined Benefit Plan [Abstract] |
Schedule of net pension and post-retirement benefit costs | For the three months ended January 31, 2020 and 2019, our net pension and post-retirement benefit cost (benefit) was comprised of the following:
| Pensions |  |  |  |
| U.S. Defined Benefit Plans |  | Non-U.S. Defined Benefit Plans |  | U.S. Post-Retirement Benefit Plan
| Three Months Ended January 31,
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
| (in millions)
Service cost—benefits earned during the period | $ | 6 |  |  | $ | 5 |  |  | $ | 4 |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |
Interest cost on benefit obligation | 6 |  |  | 7 |  |  | 4 |  |  | 6 |  |  | 1 |  |  | 2 |
Expected return on plan assets | (11 | ) |  | (11 | ) |  | (21 | ) |  | (19 | ) |  | (3 | ) |  | (3 | )
Amortization: |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss | 4 |  |  | 3 |  |  | 8 |  |  | 7 |  |  | 3 |  |  | 2 |
Prior service credit | — |  |  | (1 | ) |  | — |  |  | — |  |  | (3 | ) |  | (3 | )
Settlement loss | — |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | — |
Net periodic benefit cost (benefit) | $ | 5 |  |  | $ | 3 |  |  | $ | (5 | ) |  | $ | (1 | ) |  | $ | (2 | ) |  | $ | (2 | )

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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