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Acquisition and Divestitures (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Feb. 23, 2025	Aug. 25, 2024	May 26, 2024	Aug. 28, 2022	May 25, 2025	May 26, 2024	May 28, 2023	Nov. 24, 2024	May 29, 2022
Business Acquisition [Line Items]
Goodwill			$ 14,750.7		$ 15,622.4	$ 14,750.7	$ 14,511.2		$ 14,378.5
Pre-tax gain (loss) on sale of business					95.9	0.0	444.6
Aggregate purchase price in cash					$ 1,419.3	451.9	$ 251.5
North American Yogurt Businesses [Member]
Business Acquisition [Line Items]
Sale price of business								$ 2,100.0
Canada Yogurt Business [Member]
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business	$ 95.9
Helper main meals and Suddenly Salad side dishes businesses [Member]
Business Acquisition [Line Items]
Sale price of business				$ 606.8
Pre-tax gain (loss) on sale of business				442.2
Whitebridge Pet Brands North American Premium Cat Feeding And Pet Treating Business [Member]
Business Acquisition [Line Items]
Purchase price	1,400.0
Goodwill	1,086.7
Indefinite-Lived Intangible Assets	289.0
Finite-Lived Intangibles	$ 31.0
European Pet Business [Member]
Business Acquisition [Line Items]
Purchase price			434.1
Goodwill			317.5			317.5
Indefinite-Lived Intangible Assets			118.4			118.4
Finite-Lived Intangibles			$ 14.2			$ 14.2
Payment of acquisition amount heldback		$ 7.7
TNT Crust [Member]
Business Acquisition [Line Items]
Purchase price				253.0
Goodwill				$ 156.7