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Retirement and Post-Retirement Benefit Plans (Tables) | 3 Months Ended
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Jan. 31, 2019
Retirement Benefits [Abstract] |
Schedule of Pension and Post-Retirement Benefit (Credit) Cost | The components of HP’s pension and post-retirement benefit (credit) cost recognized in the Consolidated Condensed Statements of Earnings were as follows:
| Three months ended January 31
| U.S. Defined Benefit Plans |  | Non-U.S. Defined Benefit Plans |  | Post-Retirement Benefit Plans
| 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
| In millions
Service cost | $ | — |  |  | $ | — |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |
Interest cost | 123 |  |  | 113 |  |  | 6 |  |  | 6 |  |  | 4 |  |  | 4 |
Expected return on plan assets | (145 | ) |  | (181 | ) |  | (10 | ) |  | (10 | ) |  | (5 | ) |  | (6 | )
Amortization and deferrals: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial loss (gain) | 15 |  |  | 15 |  |  | 8 |  |  | 7 |  |  | (8 | ) |  | (4 | )
Prior service benefit | — |  |  | — |  |  | (1 | ) |  | (1 | ) |  | (3 | ) |  | (5 | )
Net periodic (credit) benefit cost | (7 | ) |  | (53 | ) |  | 17 |  |  | 16 |  |  | (12 | ) |  | (11 | )
Settlement loss | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Total periodic (credit) benefit cost | $ | (7 | ) |  | $ | (52 | ) |  | $ | 17 |  |  | $ | 16 |  |  | $ | (12 | ) |  | $ | (11 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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