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Post Retirement Benefit Plans (Tables) | 3 Months Ended
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Jan. 31, 2018
Postemployment Benefits [Abstract] |
Components of Net Periodic Pension Cost | The components of net periodic pension cost include the following:
| Three Months Ended January 31,
(in millions) | 2018 |  | 2017
Service cost | $ | 3.3 |  |  | $ | 3.3 |
Interest cost | 4.6 |  |  | 4.6 |
Expected return on plan assets | (6.1 | ) |  | (7.1 | )
Amortization of prior service cost and net actuarial gain | 3.6 |  |  | 2.8 |
Net periodic pension costs | $ | 5.4 |  |  | $ | 3.6 |
Components of Net Periodic Cost for Postretirement Benefits | The components of net periodic cost for post retirement benefits include the following:
| Three Months Ended January 31,
(in millions) | 2018 |  | 2017
Service cost | $ | — |  |  | $ | — |
Interest cost | 0.1 |  |  | 0.1 |
Amortization of prior service cost and net actuarial gain | (0.4 | ) |  | (0.3 | )
Net periodic benefit for post retirement benefits | $ | (0.3 | ) |  | $ | (0.2 | )

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- Definition Components of net periodic pension. + References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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