GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Schedule of Change in Carrying Amount of Goodwill, Excluding Amounts Classified as Held for Sale (Details) $ in Millions	6 Months Ended
Nov. 29, 2020 USD ($)
Goodwill
Balance as of May 31, 2020	$ 11,389.0
Currency translation	5.4
Balance as of November 29, 2020	11,394.4
Grocery & Snacks
Goodwill
Balance as of May 31, 2020	4,698.2
Currency translation	0.0
Balance as of November 29, 2020	4,698.2
Refrigerated & Frozen
Goodwill
Balance as of May 31, 2020	5,648.3
Currency translation	0.0
Balance as of November 29, 2020	5,648.3
International
Goodwill
Balance as of May 31, 2020	290.5
Currency translation	5.4
Balance as of November 29, 2020	295.9
Foodservice
Goodwill
Balance as of May 31, 2020	752.0
Currency translation	0.0
Balance as of November 29, 2020	$ 752.0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant