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POST RETIREMENT BENEFIT PLANS | 6 Months Ended
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Apr. 30, 2019
Postemployment Benefits [Abstract] |
POST RETIREMENT BENEFIT PLANS | POST RETIREMENT BENEFIT PLANS The components of net periodic pension cost include the following:
| Three Months Ended April 30, |  | Six Months Ended April 30,
(in millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | $ | 3.8 |  |  | $ | 3.3 |  |  | $ | 6.3 |  |  | $ | 6.6 |
Interest cost | 8.7 |  |  | 4.6 |  |  | 13.9 |  |  | 9.2 |
Expected return on plan assets | (6.2 | ) |  | (6.1 | ) |  | (12.4 | ) |  | (12.2 | )
Amortization of prior service (benefit) cost | (3.0 | ) |  | 3.6 |  |  | (1.2 | ) |  | 7.2 |
Net periodic pension cost | $ | 3.3 |  |  | $ | 5.4 |  |  | $ | 6.6 |  |  | $ | 10.8 |
Contributions, including benefits paid directly by the Company, to the pension plans were $11.8 million and $13.5 million, in the six months ended April 30, 2019 and 2018, respectively. The components of net periodic cost for post-retirement benefits include the following:
| Three Months Ended April 30, |  | Six Months Ended April 30,
(in millions) | 2019 |  | 2018 |  | 2019 |  | 2018
Interest cost | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.2 |
Amortization of prior service benefit | (0.4 | ) |  | (0.4 | ) |  | (0.8 | ) |  | (0.8 | )
Net periodic post-retirement benefit | $ | (0.3 | ) |  | $ | (0.3 | ) |  | $ | (0.6 | ) |  | $ | (0.6 | )
The components of net periodic pension cost and net periodic post-retirement benefit, other than the service cost components, are included in the line item "Other expense, net" in the interim condensed consolidated statements of income.

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- Definition The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 + Details
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