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Note 11 - Pension and Postretirement Benefits (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 27, 2022 | Nov. 28, 2021 | Nov. 27, 2022 | Nov. 28, 2021
Pension Plan [Member] |  |  |  |
Defined Benefit Plan, Service Cost Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate |  |  | 4.74% |
Defined Benefit Plan, Interest Cost Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate |  |  | 4.09% |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 2.9 | $ 1.7 | $ 5.9 | $ 3.6
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year | 6.5 |  | 6.5 |
Postemployment Retirement Benefits [Member] |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year | $ 4.5 |  | $ 4.5 |

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