Note 7 - Derivative Financial Instruments (Details Textual) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Nov. 26, 2023	Nov. 27, 2022	Nov. 25, 2018	Nov. 26, 2023	Nov. 27, 2022	Aug. 27, 2023	May 28, 2023	Aug. 28, 2022	May 29, 2022
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ 3.2	$ 9.7		$ 7.3	$ 7.4
Equity, Including Portion Attributable to Noncontrolling Interest	9,074.2	$ 8,737.7		9,074.2	$ 8,737.7	$ 8,955.1	$ 8,807.3	$ 8,576.7	$ 8,862.2
Cash Flow Hedge Pinnacle [Member]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax			$ 47.5
Cash Flow Hedge Pinnacle [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Equity, Including Portion Attributable to Noncontrolling Interest	29.7			29.7
Commodity Contract [Member] | Long [Member]
Derivative, Notional Amount	83.6			83.6			134.6
Foreign Exchange Contract [Member]
Derivative, Notional Amount	$ 86.9			$ 86.9			$ 87.3