Fair Value Measurements (Details Textuals) (USD $)	12 Months Ended		3 Months Ended	12 Months Ended
	May 30, 2010	May 29, 2011	May 30, 2010 Gilroy Foods & Flavors [Member]	May 30, 2010 Gilroy Foods & Flavors [Member]	May 30, 2010 Consumer Foods [Member]
Fair value measurements (Additional Textuals) [Abstract]
Carrying amount of partially completed Production facility impaired					$ 39,300,000
Fair value of partially completed Production facility impaired					6,000,000
Impairment charge on partially completed Production facility included in selling, general and administrative expenses				58,300,000	33,300,000
Carrying amount of noncurrent assets held for sale from discontinued business	55,200,000	0	88,700,000	88,700,000
Fair value of noncurrent assets held for sale from discontinued business			30,400,000	30,400,000
Impairment charge related to noncurrent assets held for sale from discontinued business after tax			39,900,000	39,300,000
Fair value measurements (Textuals) [Abstract]
Impairment charge related to Associated Property, plant and equipment	16,500,000
Carrying value of assets impaired	45,500,000
Fair value of assets impaired	29,000,000
Carrying amount of long-term debt	3,500,000,000	3,200,000,000
Long-term debt at fair value	$ 4,100,000,000	$ 3,600,000,000