Financial Instruments, Risk Management Activities, and Fair Values (Schedule of Unallocated Corporate items) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 25, 2025 |
May 26, 2024 |
May 28, 2023 |
|
| Commodity Price Risk [Abstract] | |||
| Net (loss) gain on mark-to-market valuation of commodity positions | $ (37.4) | $ (15.4) | $ (154.4) |
| Net loss (gain) on commodity positions reclassified from unallocated corporate items to segment operating profit | 52.8 | 40.0 | (89.5) |
| Net mark-to-market revaluation of certain grain inventories | 0.3 | 14.5 | (48.0) |
| Net mark-to-market valuation of certain commodity positions recognized in unallocated corporate items | $ 15.7 | $ 39.1 | $ (291.9) |