Condensed Consolidated Statements of Earnings (unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 27, 2011	Nov. 28, 2010	Nov. 27, 2011	Nov. 28, 2010
Condensed Consolidated Statements of Earnings [Abstract]
Net sales	$ 3,403.9	$ 3,147.5	$ 6,475.9	$ 5,951.8
Costs and expenses:
Cost of goods sold	2,646.6	2,387.5	5,119.9	4,540.5
Selling, general and administrative expenses	455.8	428.3	878.7	838.3
Interest expense, net	50.6	33.7	103.5	71.0
Income from continuing operations before income taxes and equity method investment earnings	250.9	298.0	373.8	502.0
Income tax expense	87.7	101.4	131.3	168.3
Equity method investment earnings	11.5	4.6	17.7	10.8
Income from continuing operations	174.7	201.2	260.2	344.5
Income from discontinued operations, net of tax	0	0.6	0.1	3.6
Net income	174.7	201.8	260.3	348.1
Less: Net income attributable to noncontrolling interests	2.9	0.9	3.2	0.8
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 171.8	$ 200.9	$ 257.1	$ 347.3
Earnings per share - basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.41	$ 0.46	$ 0.62	$ 0.78
Income from discontinued operations attributable to ConAgra Foods, Inc. common stockholders
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 0.41	$ 0.46	$ 0.62	$ 0.78
Earnings per share - diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.41	$ 0.45	$ 0.61	$ 0.77
Income from discontinued operations attributable to ConAgra Foods, Inc. common stockholders				$ 0.01
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 0.41	$ 0.45	$ 0.61	$ 0.78
Cash dividends declared per common share	$ 0.24	$ 0.23	$ 0.47	$ 0.43