Business Segment And Geographic Information (Operating Segment Results) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2025	Feb. 25, 2024	Feb. 23, 2025	Feb. 25, 2024
Segment Reporting Information [Line Items]
Net sales	$ 4,842.2	$ 5,099.2	$ 14,930.4	$ 15,143.3
Divestitures gain	(95.9)	0.0	(95.9)	0.0
Restructuring, impairment, and other exit costs (recoveries)	(0.8)	5.8	2.6	130.6
Operating profit	891.4	910.7	2,800.8	2,652.5
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	4,839.4	5,098.4	14,923.2	15,142.5
Operating profit	850.6	980.4	2,952.0	3,091.4
Unallocated Corporate Items [Member]
Segment Reporting Information [Line Items]
Operating profit	55.9	63.9	244.5	308.3
North America Retail [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	3,009.1	3,242.1	9,347.2	9,620.1
Operating profit	648.1	752.2	2,256.1	2,410.3
U.S. Meals & Baking Solutions [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,130.4	1,168.5	3,404.6	3,453.7
U.S. Morning Foods [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	846.3	940.7	2,642.1	2,725.4
U.S. Snacks [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	818.0	869.2	2,571.6	2,660.0
Canada [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	214.4	263.7	728.9	781.0
International [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	651.3	680.1	2,058.9	2,079.0
Operating profit	18.0	18.2	62.7	102.8
North America Pet [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	623.7	624.5	1,795.6	1,773.7
Operating profit	102.2	128.3	360.9	342.0
North America Foodservice [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	555.3	551.7	1,721.5	1,669.7
Operating profit	82.3	81.7	272.3	236.3
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 2.8	$ 0.8	$ 7.2	$ 0.8