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Pension Plans | 3 Months Ended
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Aug. 31, 2019
Retirement Benefits [Abstract] |
Pension Plans | Pension Plans In conjunction with the acquisition of G&K in fiscal 2017, Cintas assumed G&K's noncontributory frozen defined benefit pension plan (the Pension Plan) that covers substantially all G&K employees who were employed as of July 1, 2005, except certain employees who were covered by union-administered plans. Benefits are based on the number of years of service and each employee’s compensation near retirement. We will make annual contributions to the Pension Plan consistent with federal funding requirements. The Pension Plan was frozen by G&K effective December 31, 2006. Future growth in benefits will not occur beyond this date. Applicable accounting standards require that the consolidated condensed balance sheet reflect the funded status of the Pension Plan. The funded status of the Pension Plan is measured as the difference between the plan assets at fair value and the projected benefit obligation. The net pension liability is included in long-term accrued liabilities on the consolidated condensed balance sheets. Unrecognized differences between actual amounts and estimates based on actuarial assumptions are included in accumulated other comprehensive income in our consolidated condensed balance sheets. The difference between actual amounts and estimates based on actuarial assumptions are recognized in other comprehensive income in the period in which they occur. The Pension Plan assumptions are evaluated annually and are updated as deemed necessary. The components of net periodic benefit cost are summarized as follows:
| Three Months Ended
(In thousands) | August 31, 2019 |  | August 31, 2018
Interest cost | $ | 720 |  |  | $ | 781 |
Expected return on assets | (740 | ) |  | (721 | )
Net periodic benefit cost | $ | (20 | ) |  | $ | 60 |

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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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