Consolidated Statements of Earnings (USD $) In Millions, except Per Share data	12 Months Ended
	May 29, 2011	May 30, 2010	May 31, 2009
Consolidated Statements of Earnings [Abstract]
Net sales	$ 12,303.1	$ 12,014.9	$ 12,348.6
Costs and expenses:
Cost of goods sold	9,389.6	8,953.7	9,571.1
Selling, general and administrative expenses	1,511.1	1,819.4	1,683.2
Interest expense, net	177.5	160.4	186.0
Income from continuing operations before income taxes and equity method investment earnings	1,224.9	1,081.4	908.3
Income tax expense	421.0	360.9	317.1
Equity method investment earnings	26.4	22.1	24.0
Income from continuing operations	830.3	742.6	615.2
Income (loss) from discontinued operations, net of tax	(11.5)	(19.3)	363.8
Net income	818.8	723.3	979.0
Less: Net income (loss) attributable to noncontrolling interests	1.8	(2.5)	0.6
Net income attributable to ConAgra Foods, Inc.	$ 817.0	$ 725.8	$ 978.4
Earnings per share - basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 1.92	$ 1.68	$ 1.36
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders	$ (0.02)	$ (0.05)	$ 0.80
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.90	$ 1.63	$ 2.16
Earnings per share - diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 1.90	$ 1.66	$ 1.35
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders	$ (0.02)	$ (0.04)	$ 0.80
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.88	$ 1.62	$ 2.15