ACQUISITIONS AND DIVESTITURES (Details) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	May 29, 2011	May 30, 2010	May 31, 2009
Acquisitions Abstract
Shares issued for acquisition, value			$ 55,000,000
Goodwill acquired during period	71,500,000		41,600,000
Future Payments To Acquire Businesses Gross	1,200,000,000
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines	34,400,000	0	244,700,000
Mountain High [Member]
Acquisitions Abstract
Business Acquisition Cost Of Acquired Entity Cash Paid	84,800,000
Humm Foods [Member]
Acquisitions Abstract
Shares issued for acquisition, value			55,000,000
Shares issued for acquisition, shares			1.8
Goodwill acquired during period			41,600,000
Yoplait Marques SAS
Acquisitions Abstract
Consolidated Future Ownership Percentage	50.00%
Yoplait SAS
Acquisitions Abstract
Consolidated Future Ownership Percentage	51.00%
Frozen Baked Goods Line [Member]
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines	24,900,000
Gain Loss On Sale Of Other Assets	14,300,000
Frozen Pie Product Line [Member]
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines	9,500,000
Gain Loss On Sale Of Other Assets	3,100,000
Bread Concentrates Product Line [Member]
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines			8,300,000
Gain Loss On Sale Of Other Assets			(5,600,000)
Frozen Unbaked Bread Dough [Member]
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines			43,900,000
Gain Loss On Sale Of Other Assets			(38,300,000)
Noncash Or Part Noncash Divestiture Amount Of Consideration Received			11,900,000
Proceeds From Collection Of Notes Receivable		3,200,000
Pop Secret [Member]
Divestitures And Sales of Assets Abstract
Proceeds from divestiture of product lines			192,500,000
Gain Loss On Sale Of Other Assets			128,800,000
Proceeds From Divestiture Of Product Line Net Of Cash Expenses Paid			$ 158,900,000