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Quarterly Data (Unaudited) (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	May 30, 2021	May 31, 2020	May 26, 2019	Feb. 24, 2019	May 30, 2021	May 31, 2020	May 26, 2019
Business Acquisition [Line Items]
Restructuring Charges (Reversal), Including Restructuring Charges Associated with Cost of Goods Sold		$ 11.5			$ 172.7		$ 77.6
Business Acquisition and Divestiture, Transaction Costs	$ 9.5
Deferred income taxes	11.2				$ 118.8	$ (29.6)	$ 96.0
Fiscal Period Duration					364 days	371 days	364 days
Divestitures loss					$ 53.5	$ 0.0	$ 30.0
Pet Segment [Member]
Business Acquisition [Line Items]
Fiscal Period Duration		4 months	3 months		12 months	13 months	12 months
Brazil
Business Acquisition [Line Items]
Gain on indirect Taxes	$ 8.8
Yoplait SAS [Member]
Business Acquisition [Line Items]
Minority Interest, Ownership Percentage by Parent	51.00%				51.00%
Global organizational structure and resource alignment [Member]
Business Acquisition [Line Items]
Restructuring Charges (Reversal), Including Restructuring Charges Associated with Cost of Goods Sold	$ 157.3				$ 157.3
Green Giant International Business [Member]
Business Acquisition [Line Items]
Product Recall Expense		$ 19.3
Laticinios Carolina [Member]
Business Acquisition [Line Items]
Divestitures loss	$ 53.5
La Saltena [Member]
Business Acquisition [Line Items]
Divestitures loss				$ 35.4

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