Note 16 - Business Segments and Related Information - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Feb. 25, 2024	Nov. 26, 2023	Aug. 27, 2023	Feb. 26, 2023	Nov. 27, 2022	Aug. 28, 2022	Feb. 25, 2024	Feb. 26, 2023
Net sales	$ 3,032.9			$ 3,086.5			$ 9,145.0	$ 9,303.7
Operating profit	578.4			580.9			1,647.4	1,299.2
Equity method investment earnings	41.2			50.5			131.0	149.0
General corporate expense	107.0			90.9			238.5	280.9
Pension and postretirement non-service expense (income)	1.4			(6.0)			2.1	(18.2)
Interest expense, net	(106.5)			(104.2)			(325.8)	(301.6)
Income tax expense	95.9			100.1			297.1	237.0
Net income	308.8			342.2			914.9	646.9
Less: Net income attributable to noncontrolling interests	0.2			0.5			0.4	0.8
Net of tax	308.6	$ 286.2	$ 319.7	341.7	$ 381.9	$ (77.5)	914.5	646.1
Net Sales	3,032.9			3,086.5			9,145.0	9,303.7
Grocery And Snacks [Member]
Net sales	1,286.0			1,243.7			3,784.0	3,781.9
Operating profit	299.3			256.4			837.2	847.2
Net Sales	1,286.0			1,243.7			3,784.0	3,781.9
Refrigerated And Frozen [Member]
Net sales	1,202.4			1,307.7			3,692.5	3,936.8
Operating profit	201.5			263.6			620.9	297.6
Net Sales	1,202.4			1,307.7			3,692.5	3,936.8
International [Member]
Net sales	271.7			259.7			811.5	751.9
Operating profit	42.2			37.1			71.8	100.9
Net Sales	271.7			259.7			811.5	751.9
Foodservice [Member]
Net sales	272.8			275.4			857.0	833.1
Operating profit	35.4			23.8			117.5	53.5
Net Sales	272.8			275.4			857.0	833.1
Frozen [Member]
Net sales	1,021.8			1,101.2			3,076.3	3,267.1
Net Sales	1,021.8			1,101.2			3,076.3	3,267.1
Other Shelf-stable [Member]
Net sales	750.1			719.2			2,174.9	2,167.7
Net Sales	750.1			719.2			2,174.9	2,167.7
Refrigerated [Member]
Net sales	180.6			206.5			616.2	669.7
Net Sales	180.6			206.5			616.2	669.7
Snacks [Member]
Net sales	535.9			524.5			1,609.1	1,614.2
Net Sales	535.9			524.5			1,609.1	1,614.2
Foodservice [Member]
Net sales	272.8			275.4			857.0	833.1
Net Sales	272.8			275.4			857.0	833.1
International [Member]
Net sales	271.7			259.7			811.5	751.9
Net Sales	$ 271.7			$ 259.7			$ 811.5	$ 751.9