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Business Segment And Geographic Information (Net Sales By Class Of Similar Products) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 26, 2023	Nov. 27, 2022	Nov. 26, 2023	Nov. 27, 2022
Product Information [Line Items]
Net sales	$ 5,139.4	$ 5,220.7	$ 10,044.1	$ 9,938.3
Snacks [Member]
Product Information [Line Items]
Net sales	1,037.3	1,102.8	2,174.0	2,171.2
Cereal [Member]
Product Information [Line Items]
Net sales	776.9	810.9	1,594.8	1,625.6
Convenient meals [Member]
Product Information [Line Items]
Net sales	785.1	786.4	1,450.6	1,465.6
Dough [Member]
Product Information [Line Items]
Net sales	775.1	745.6	1,310.0	1,210.4
Pet [Member]
Product Information [Line Items]
Net sales	572.3	593.7	1,152.2	1,174.5
Baking mixes and ingredients [Member]
Product Information [Line Items]
Net sales	562.3	563.7	1,028.8	1,037.2
Yogurt [Member]
Product Information [Line Items]
Net sales	364.9	357.5	733.3	703.5
Super-premium ice cream [Member]
Product Information [Line Items]
Net sales	168.3	164.9	392.3	348.4
Other [Member]
Product Information [Line Items]
Net sales	$ 97.2	$ 95.2	$ 208.1	$ 201.9

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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