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Note 17 - Pension and Postretirement Benefits- Schedule of Pension Plan Weighted-Average Asset Allocations and Target Asset Allocations (Details) - USD ($) $ in Millions | May 29, 2022 | May 30, 2021
--- | --- | ---
Fair value measurement of pension plan assets in the fair value hierarchy | $ 3,294.7 |
Weighted-average Asset Allocations | 100.00% | 100.00%
Defined Benefit Plan, Equity Securities [Member] |  |
Weighted-average Asset Allocations | 4.00% | 8.00%
Defined Benefit Plan, Debt Security [Member] |  |
Weighted-average Asset Allocations | 87.00% | 83.00%
Defined Benefit Plan, Real Estate [Member] |  |
Weighted-average Asset Allocations | 1.00% | 1.00%
Private Equity Funds [Member] |  |
Weighted-average Asset Allocations | 4.00% | 3.00%
Other Plan Asset Category [Member] |  |
Weighted-average Asset Allocations | 4.00% | 5.00%
Receivable For Unsettled Transactions [Member] |  |
Net payables for unsettled transactions | $ (9.6) |
Pension Plan Assets [Member] |  |
Total pension plan assets |  | $ 3,848.8
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
Total pension plan assets | 19.8 | 7.5
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
Total pension plan assets | 65.6 | 78.0
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
Total pension plan assets | 34.4 | 121.9
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Real Estate [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 1 [Member] | Receivable For Unsettled Transactions [Member] |  |
Total pension plan assets |  | 5.7
Net payables for unsettled transactions | (9.6) |
Fair Value, Inputs, Level 1 [Member] | Pension Plan Assets [Member] |  |
Total pension plan assets |  | 213.1
Fair value measurement of pension plan assets in the fair value hierarchy | 110.2 |
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
Total pension plan assets | 93.2 | 85.0
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
Total pension plan assets | 19.5 | 94.6
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
Total pension plan assets | 0.0 | 0.5
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Real Estate [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member] |  |
Total pension plan assets | 653.1 | 772.6
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
Total pension plan assets | 2,179.3 | 2,407.2
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
Total pension plan assets | 8.6 | 12.4
Fair Value, Inputs, Level 2 [Member] | Receivable For Unsettled Transactions [Member] |  |
Total pension plan assets |  | 0.0
Net payables for unsettled transactions | 0.0 |
Fair Value, Inputs, Level 2 [Member] | Pension Plan Assets [Member] |  |
Total pension plan assets |  | 3,372.3
Fair value measurement of pension plan assets in the fair value hierarchy | 2,953.7 |
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan, Real Estate [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 3 [Member] | Receivable For Unsettled Transactions [Member] |  |
Total pension plan assets |  | 0.0
Net payables for unsettled transactions | 0.0 |
Fair Value, Inputs, Level 3 [Member] | Pension Plan Assets [Member] |  |
Total pension plan assets |  | 0.0
Fair value measurement of pension plan assets in the fair value hierarchy | 0.0 |
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
Total pension plan assets | 113.0 | 92.5
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
Total pension plan assets | 85.1 | 172.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
Total pension plan assets | 34.4 | 122.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Real Estate [Member] |  |
Total pension plan assets | 0.0 | 0.0
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | US Treasury and Government [Member] |  |
Total pension plan assets | 653.1 | 772.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Corporate Debt Securities [Member] |  |
Total pension plan assets | 2,179.3 | 2,407.2
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
Total pension plan assets | 8.6 | 12.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Receivable For Unsettled Transactions [Member] |  |
Total pension plan assets |  | 5.7
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Pension Plan Assets [Member] |  |
Total pension plan assets |  | 3,585.4
Fair value measurement of pension plan assets in the fair value hierarchy | 3,063.9 |
Fair Value Measured at Net Asset Value Per Share [Member] |  |
Fair value measurement of pension plan assets in the fair value hierarchy | $ 230.8 |
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan Assets [Member] |  |
Total pension plan assets |  | $ 263.4

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