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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, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 2023
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 on plan assets | (5) | (4) | (10) | (9)
Amortization of net actuarial (gain) loss | 0 | 0 | 1 | 0
Amortization of Prior Service Benefit | 0 | 0 | 0 | 0
Total net periodic benefit cost (income) | 0 | 1 | 1 | 1
Pension Plan | Foreign Plan |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Income) |  |  |  |
Service cost - benefits earned during the period | 3 | 2 | 8 | 8
Interest cost on benefit obligation | 7 | 6 | 13 | 12
Expected return on plan assets | (10) | (9) | (19) | (18)
Amortization of net actuarial (gain) loss | (4) | 0 | (8) | (1)
Amortization of Prior Service Benefit | 0 | 0 | 0 | 0
Total net periodic benefit cost (income) | (4) | (1) | (6) | 1
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 | 1 | 1 | 2 | 2
Expected return on plan assets | (1) | (1) | (2) | (2)
Amortization of net actuarial (gain) loss | (1) | 0 | (1) | 0
Amortization of Prior Service Benefit | 0 | (1) | 0 | (1)
Total net periodic benefit cost (income) | $ (1) | $ (1) | $ (1) | $ (1)

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