GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Narratives (Details) $ in Millions	3 Months Ended				12 Months Ended
	May 25, 2025 USD ($)	Nov. 24, 2024 USD ($)	May 26, 2024 USD ($)	Aug. 28, 2022 USD ($) item	May 25, 2025 USD ($)	May 26, 2024 USD ($)	May 28, 2023 USD ($)
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets					$ 72.1	$ 430.2	$ 589.2
Impairment charges on goodwill		$ 0.0				526.5	141.7
Goodwill carrying amount	$ 10,501.9		$ 10,325.9		$ 10,501.9	10,325.9	10,852.6
Reorganization of reporting structure, number of reporting units | item				2
Amortization period for intangible assets					16 years
Amortization of intangible assets					$ 53.7	53.6	56.8
Trade names
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets					72.1
Birds Eye Brand Name
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets						255.4
Earth Balance Brand Name
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets						72.1
Sides, Components, Enhancers reporting unit
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Goodwill carrying amount			1,400.0			1,400.0
Accumulated impairment losses to goodwill			668.2			668.2	141.7
Grocery & Snacks and Refrigerated & Frozen
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets		$ 18.9
Grocery & Snacks and Refrigerated & Frozen | Trade names
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets							$ 589.2
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]							Selling, General and Administrative Expense
Grocery & Snacks and Refrigerated & Frozen | Trademarks and trade names
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets	53.2					430.2	$ 345.2
Grocery & Snacks and Refrigerated & Frozen | Gardein Brand Name
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets							91.5
Grocery & Snacks and Refrigerated & Frozen | Birds Eye Brand Name
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets							78.3
Refrigerated & Frozen
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets					60.2	352.6	496.6
Impairment charges on goodwill			526.5	$ 141.7		526.5	141.7
Goodwill carrying amount	$ 4,916.6		$ 4,916.6		$ 4,916.6	$ 4,916.6	$ 5,443.1
Refrigerated & Frozen | Birds Eye Brand Name
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Impairment of Intangible Assets				$ 244.0
Discount rate
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Reporting unit measurement input	7.5				7.5
Revenue growth rate | Minimum
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Reporting unit measurement input	1				1
Revenue growth rate | Maximum
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS
Reporting unit measurement input	1.5				1.5