Acquisition and Divestiture (Components of assets held for sale and liabilities held for sale) (Details) - USD ($) $ in Millions	Nov. 28, 2021	May 30, 2021	Nov. 29, 2020
Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 123.7		$ 0.0
Assets held for sale	1,263.2	$ 0.0
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Liabilities held for sale	604.3	$ 0.0
Yoplait SAAS, Yoplait Marques SNC and Liberte Marques Sarl [Member]
Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	123.7
Receivables	111.2
Inventories	24.6
Prepaid expenses and other current assets	18.4
Land, buildings, and equipment	164.3
Goodwill	194.9
Other intangible assets	621.8
Other assets	4.3
Assets held for sale	1,263.2
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable	90.8
Current portion of long-term debt	56.6
Notes payable	262.9
Other current liabilities	102.3
Deferred income taxes	77.7
Other liabilities	14.0
Liabilities held for sale	$ 604.3