Consolidated Statements of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 27, 2012	May 29, 2011	May 30, 2010
Consolidated Statements of Earnings [Abstract]
Net sales	$ 13,262.6	$ 12,303.1	$ 12,014.9
Costs and expenses:
Cost of goods sold	10,435.7	9,389.6	8,966.3
Selling, general and administrative expenses	1,997.7	1,509.9	1,987.7
Interest expense, net	204.0	177.5	160.4
Income from continuing operations before income taxes and equity method investment earnings	625.2	1,226.1	900.5
Income tax expense	195.8	421.6	292.3
Equity method investment earnings	44.9	26.4	22.1
Income from continuing operations	474.3	830.9	630.3
Income (loss) from discontinued operations, net of tax	0.1	(11.5)	(19.3)
Net income	474.4	819.4	611.0
Less: Net income (loss) attributable to noncontrolling interests	6.5	1.8	(2.5)
Net income attributable to ConAgra Foods, Inc.	$ 467.9	$ 817.6	$ 613.5
Earnings per share - basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 1.13	$ 1.92	$ 1.43
Loss from discontinued operations attributable to ConAgra Foods, Inc. common stockholders		$ (0.02)	$ (0.05)
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.13	$ 1.90	$ 1.38
Earnings per share - diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 1.12	$ 1.90	$ 1.41
Loss from discontinued operations attributable to ConAgra Foods, Inc. common stockholders		$ (0.02)	$ (0.04)
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.12	$ 1.88	$ 1.37