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Retirement Plans | 6 Months Ended
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Oct. 31, 2018
Retirement Plans [Abstract] |
Retirement Plans | Note 12 — Retirement Plans The components of net pension expense (income) for our global defined benefit plans were as follows:
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost |  | $ | 229 |  |  | $ | 242 |  |  | $ | 462 |  |  | $ | 472 |
Interest cost |  |  | 6,169 |  |  |  | 6,346 |  |  |  | 12,381 |  |  |  | 12,598 |
Expected return on plan assets |  |  | (9,720 | ) |  |  | (9,782 | ) |  |  | (19,622 | ) |  |  | (19,439 | )
Net amortization of prior service cost |  |  | (24 | ) |  |  | (23 | ) |  |  | (48 | ) |  |  | (48 | )
Unrecognized net actuarial loss |  |  | 1,474 |  |  |  | 1,534 |  |  |  | 2,908 |  |  |  | 3,035 |
Net pension income |  | $ | (1,872 | ) |  | $ | (1,683 | ) |  | $ | (3,919 | ) |  | $ | (3,382 | )
We adopted ASU 2017-07, “Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” on May 1, 2018. Refer to Note 2, "Recent Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information. The guidance requires that the service cost component of net pension and postretirement benefit costs be reported in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. Such amounts are reflected in Operating and Administrative Expenses on our Condensed Consolidated Statement of Operations. The guidance requires that the other components of net benefit costs be reported separately from the service cost component and below operating income. Such amounts are reflected in Interest Income and Other on our Condensed Consolidated Statement of Operations. We were required to retrospectively adopt this guidance. Employer defined benefit pension plan contributions were $3.5 million and $2.8 million for the three months ended October 31, 2018 and 2017, respectively, and $7.1 million and $5.6 million for the six months ended October 31, 2018 and 2017, respectively. The expense for employer defined contribution plans were approximately $2.8 million and $3.0 million for the three months ended October 31, 2018 and 2017, respectively, and $7.3 million and $7.9 million for the six months ended October 31, 2018 and 2017, respectively.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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