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BUSINESS SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Operating Segment Results (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	May 31, 2026	Feb. 22, 2026	Nov. 23, 2025	Aug. 24, 2025	May 25, 2025	Feb. 23, 2025	Nov. 24, 2024	Aug. 25, 2024	May 31, 2026	May 25, 2025	May 26, 2024
Segment Reporting Information [Line Items]
Net sales	$ 4,609.6	$ 4,436.7	$ 4,860.8	$ 4,517.5	$ 4,556.2	$ 4,842.2	$ 5,240.1	$ 4,848.1	$ 18,424.6	$ 19,486.6	$ 19,857.2
Cost of sales									12,228.9	12,753.6	12,925.1
Selling, general, and administrative expenses									3,388.5	3,445.8	3,259.0
Divestitures gain, net									(1,049.4)	(95.9)	0.0
Restructuring, transformation, impairment, and other exit costs									2,970.8	78.3	241.4
Operating profit									885.8	3,304.8	3,431.7
Operating Segments
Segment Reporting Information [Line Items]
Net sales									18,398.4	19,476.5	19,854.4
Operating profit									3,209.5	3,682.7	4,007.0
Corporate and Joint Ventures
Segment Reporting Information [Line Items]
Net sales									26.2	10.1	2.8
Operating profit									402.3	395.5	333.9
North America Retail \| Operating Segments
Segment Reporting Information [Line Items]
Net sales									10,571.8	11,907.0	12,473.4
Cost of sales									6,793.2	7,472.1	7,650.8
Selling, general, and administrative expenses									1,589.6	1,705.0	1,742.2
Operating profit									2,189.0	2,729.9	3,080.4
North America Retail \| Operating Segments \| Big G Cereal & Canada
Segment Reporting Information [Line Items]
Net sales									3,153.4	4,311.8	4,610.2
North America Retail \| Operating Segments \| U.S. Snacks
Segment Reporting Information [Line Items]
Net sales									3,212.6	3,356.3	3,538.9
North America Retail \| Operating Segments \| U.S. Meals & Baking Solutions
Segment Reporting Information [Line Items]
Net sales									4,205.8	4,238.9	4,324.3
International \| Operating Segments
Segment Reporting Information [Line Items]
Net sales									3,043.8	2,797.8	2,746.5
Cost of sales									2,235.5	2,110.6	2,073.4
Selling, general, and administrative expenses									619.6	590.8	547.9
Operating profit									188.7	96.4	125.2
North America Pet \| Operating Segments
Segment Reporting Information [Line Items]
Net sales									2,613.3	2,470.8	2,375.8
Cost of sales									1,568.6	1,476.4	1,446.8
Selling, general, and administrative expenses									545.9	493.4	443.1
Operating profit									498.8	501.0	485.9
North America Foodservice \| Operating Segments
Segment Reporting Information [Line Items]
Net sales									2,169.5	2,300.9	2,258.7
Cost of sales									1,663.3	1,772.9	1,781.9
Selling, general, and administrative expenses									173.2	172.6	161.3
Operating profit									$ 333.0	$ 355.4	$ 315.5