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Retirement Plans | 3 Months Ended
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Jul. 31, 2019
Retirement Plans [Abstract] |
Retirement Plans | Note 14 — Retirement Plans The components of net pension income for our global defined benefit plans were as follows:
|  | Three Months Ended July 31, |
|  | 2019 |  |  | 2018 |
Service cost |  | $ | 224 |  |  | $ | 233 |
Interest cost |  |  | 5,834 |  |  |  | 6,212 |
Expected return on plan assets |  |  | (10,059 | ) |  |  | (9,902 | )
Net amortization of prior service cost |  |  | (19 | ) |  |  | (24 | )
Unrecognized net actuarial loss |  |  | 1,600 |  |  |  | 1,434 |
Net pension income |  | $ | (2,420 | ) |  | $ | (2,047 | )
Employer defined benefit pension plan contributions were $4.7 million and $3.6 million for the three months ended July 31, 2019 and 2018, respectively. The expense for employer defined contribution plans was $4.3 million and $4.5 million for the three months ended July 31, 2019 and 2018, 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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