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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables) | 3 Months Ended
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Jan. 31, 2018
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] |
Schedule of net pension and post-retirement benefit costs | Components of net periodic costs. For the three months ended January 31, 2018 and 2017, our net pension and post retirement benefit costs were comprised of the following:
| Pensions |  |
| U.S. Plans |  | Non-U.S. Plans |  | U.S. Post Retirement Benefit Plans
| Three Months Ended January 31,
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
| (in millions)
Service cost—benefits earned during the period | $ | — |  |  | $ | — |  |  | $ | 6 |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |
Interest cost on benefit obligation | 4 |  |  | 3 |  |  | 3 |  |  | 3 |  |  | 1 |  |  | 1 |
Expected return on plan assets | (7 | ) |  | (6 | ) |  | (11 | ) |  | (10 | ) |  | (2 | ) |  | (2 | )
Amortization: |  |  |  |  |  |  |  |  |  |  |
Actuarial losses | — |  |  | 1 |  |  | 7 |  |  | 9 |  |  | 2 |  |  | 3 |
Prior service credits | — |  |  | — |  |  | — |  |  | — |  |  | (2 | ) |  | (2 | )
Total net plan costs | $ | (3 | ) |  | $ | (2 | ) |  | $ | 5 |  |  | $ | 6 |  |  | $ | (1 | ) |  | $ | — |
Settlements gains | $ | — |  |  | $ | — |  |  | $ | (5 | ) |  | $ | (32 | ) |  | $ | — |  |  | $ | — |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=73719040&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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