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Note 12 - Pension and Postretirement Benefits - Schedule of Projected Benefit Obligation, Accumulated Benefit Obligation, and Fair Value of Plan Assets (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Aug. 27, 2023 | Aug. 28, 2022
Pension Plan [Member] |  |
Service cost | $ 1.5 | $ 1.6
Interest cost | 36.7 | 31.0
Expected return on plan assets | (35.8) | (36.5)
Amortization of prior service cost | 0.4 | 0.4
Total pension and postretirement cost (benefit) | 4.9 | (1.3)
Total pension and postretirement cost (benefit) | 4.9 | (1.3)
Total pension and postretirement cost (benefit) | 4.9 | (1.3)
Pension Plan [Member] | Company Plans [Member] |  |
Total pension and postretirement cost (benefit) | 2.8 | (3.5)
Total pension and postretirement cost (benefit) | 2.8 | (3.5)
Total pension and postretirement cost (benefit) | 2.8 | (3.5)
Pension Plan [Member] | Multi Employer Plans [Member] |  |
Total pension and postretirement cost (benefit) | 2.1 | 2.2
Total pension and postretirement cost (benefit) | 2.1 | 2.2
Total pension and postretirement cost (benefit) | 2.1 | 2.2
Other Postretirement Benefits Plan [Member] |  |
Interest cost | 0.6 | 0.5
Amortization of prior service cost | (0.4) | (0.4)
Total pension and postretirement cost (benefit) | (1.0) | (1.0)
Total pension and postretirement cost (benefit) | (1.0) | (1.0)
Total pension and postretirement cost (benefit) | (1.0) | (1.0)
Recognized net actuarial gain | $ (1.2) | $ (1.1)

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