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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables) | 6 Months Ended
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Apr. 30, 2017
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 and six months ended April 30, 2017 and 2016, 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 April 30,
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (in millions)
Service cost—benefits earned during the period | $ | — |  |  | $ | 6 |  |  | $ | 4 |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |
Interest cost on benefit obligation | 5 |  |  | 4 |  |  | 3 |  |  | 4 |  |  | 2 |  |  | 1 |
Expected return on plan assets | (6 | ) |  | (6 | ) |  | (10 | ) |  | (11 | ) |  | (2 | ) |  | (1 | )
Amortization: |  |  |  |  |  |  |  |  |  |  |
Actuarial losses | 1 |  |  | — |  |  | 9 |  |  | 7 |  |  | 2 |  |  | 2 |
Prior service cost | (1 | ) |  | (1 | ) |  | — |  |  | — |  |  | (2 | ) |  | (3 | )
Total net plan costs | $ | (1 | ) |  | $ | 3 |  |  | $ | 6 |  |  | $ | 5 |  |  | $ | — |  |  | $ | (1 | )
Curtailments and settlements gains | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Pensions |  |
| U.S. Plans |  | Non-U.S. Plans |  | U.S. Post Retirement Benefit Plans
| Six Months Ended April 30,
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (in millions)
Service cost—benefits earned during the period | $ | — |  |  | $ | 12 |  |  | $ | 8 |  |  | $ | 9 |  |  | $ | — |  |  | $ | — |
Interest cost on benefit obligation | 8 |  |  | 7 |  |  | 6 |  |  | 8 |  |  | 3 |  |  | 2 |
Expected return on plan assets | (12 | ) |  | (12 | ) |  | (20 | ) |  | (22 | ) |  | (4 | ) |  | (3 | )
Amortization: | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Actuarial losses | 2 |  |  | 2 |  |  | 18 |  |  | 14 |  |  | 5 |  |  | 5 |
Prior service cost | (1 | ) |  | (2 | ) |  | — |  |  | — |  |  | (4 | ) |  | (5 | )
Total net plan costs | $ | (3 | ) |  | $ | 7 |  |  | $ | 12 |  |  | $ | 9 |  |  | $ | — |  |  | $ | (1 | )
Curtailments and settlements gains | $ | — |  |  | $ | (16 | ) |  | $ | (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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