ACQUISITIONS (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended			1 Months Ended							12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012	Sep. 05, 2013 Harlan Bakeries [Member]	Jan. 29, 2013 Ralcorp	May 25, 2014 Ralcorp	Aug. 31, 2012 P F Changs And Bertolli Brands Frozen Meal Business	May 31, 2012 Kangaroo Brands' Pita Chip	May 31, 2012 Odom's Tennessee Pride	Mar. 31, 2012 Del Monte Canada	Nov. 30, 2011 National pretzel company	Nov. 30, 2011 ATFL	May 27, 2012 ATFL	May 26, 2013 Conagra Foods	May 26, 2013 Ralcorp	May 25, 2014 Private Brands	May 26, 2013 Private Brands	May 27, 2012 Private Brands	May 25, 2014 Private Brands Ralcorp	May 25, 2014 Consumer Foods	May 26, 2013 Consumer Foods	May 27, 2012 Consumer Foods	May 25, 2014 Consumer Foods Ralcorp	May 25, 2014 Commercial Foods	May 26, 2013 Commercial Foods	May 27, 2012 Commercial Foods	May 25, 2014 Commercial Foods Ralcorp	Jan. 29, 2013 Unsecured Debt Term Facility Agreement Ralcorp	Jan. 29, 2013 Goodwill Ralcorp	Jan. 29, 2013 Other Intangible Assets Ralcorp	Jan. 29, 2013 Goodwill Ralcorp	May 25, 2014 Goodwill Private Brands	Jan. 29, 2013 Other Intangible Assets Ralcorp	May 25, 2014 Other Intangible Assets Private Brands
Business Acquisitions [Line Items]
Consideration paid for the merger	$ 39,900,000	$ 5,018,800,000	$ 635,200,000		$ 4,750,000,000						$ 301,900,000	$ 4,900,000
Face amount of debt instrument																												1,500,000,000.0
Purchase price allocated to goodwill	7,836,500,000	8,426,700,000	4,008,800,000		4,360,600,000		100,100,000	20,400,000	32,400,000	44,700,000	178,500,000		130,300,000			3,214,600,000	3,793,200,000	321,700,000	3,520,000,000	3,748,500,000	3,760,500,000	3,162,100,000	512,000,000	873,400,000	873,000,000	525,000,000	350,600,000		4,380,000,000
Brands, trademarks and other intangibles					2,152,700,000		91,800,000																							2,170,000,000
Noncurrent assets held for sale	10,900,000	144,100,000			57,200,000																										17,500,000	17,500,000	14,600,000	14,400,000
Purchase price allocated to brands, trademarks and other intangibles						2,030,000,000		20,800,000	32,800,000	80,900,000	68,200,000		42,200,000
Payments to acquire a business				39,900,000			266,900,000	47,900,000	96,600,000	185,600,000
Intangibles						134,100,000
Deductible for tax purposes						397,000,000
Percentage of interest acquired													52.00%
Percentage of non-controlling interest under the equity method													48.00%
Business acquisition transaction related expenses														71,400,000	84,400,000
Business acquisition non recurring expense														$ 16,700,000