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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024
Pension Plan | United States |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Income) |  |  |  |
Service cost - benefits earned during the period | $ 0 | $ 0 | $ 0 | $ 0
Interest cost on benefit obligation | 5 | 5 | 10 | 10
Expected return (loss) on plan assets | (6) | (5) | (12) | (10)
Amortization of net actuarial gain (loss) | 0 | 0 | 0 | (1)
Total net periodic benefit cost (income) | (1) | 0 | (2) | 1
Pension Plan | Foreign Plan |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Income) |  |  |  |
Service cost - benefits earned during the period | 2 | 3 | 7 | 8
Interest cost on benefit obligation | 5 | 7 | 11 | 13
Expected return (loss) on plan assets | (10) | (10) | (21) | (19)
Amortization of net actuarial gain (loss) | 6 | 4 | 12 | 8
Total net periodic benefit cost (income) | (9) | (4) | (15) | (6)
Curtailments and Settlements |  |  |  |
Settlement (gain) loss |  |  | 14 |
Other Postretirement Benefits Plan | United States |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Income) |  |  |  |
Service cost - benefits earned during the period | 0 | 0 | 0 | 0
Interest cost on benefit obligation | 2 | 1 | 2 | 2
Expected return (loss) on plan assets | (2) | (1) | (3) | (2)
Amortization of net actuarial gain (loss) | 1 | 1 | 1 | 1
Total net periodic benefit cost (income) | $ (1) | $ (1) | $ (2) | $ (1)

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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