Condensed Consolidated Statements of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 24, 2014	Aug. 25, 2013
Income Statement [Abstract]
Net sales	$ 3,701.0	$ 3,715.8
Costs and expenses:
Cost of goods sold	2,997.2	2,923.7
Selling, general and administrative expenses	492.0	538.1
Interest expense, net	83.7	95.8
Income from continuing operations before income taxes and equity method investment earnings	128.1	158.2
Income tax expense	42.5	28.9
Equity method investment earnings	25.6	4.1
Income from continuing operations	111.2	133.4
Income from discontinued operations, net of tax	373.3	13.8
Net income	484.5	147.2
Less: Net income attributable to noncontrolling interests	2.2	2.9
Net income attributable to ConAgra Foods, Inc.	$ 482.3	$ 144.3
Earnings per share — basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.26	$ 0.31
Income from discontinued operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.88	$ 0.03
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.14	$ 0.34
Earnings per share — diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.25	$ 0.30
Income from discontinued operations attributable to ConAgra Foods, Inc. common stockholders	$ 0.87	$ 0.04
Net income attributable to ConAgra Foods, Inc. common stockholders	$ 1.12	$ 0.34
Cash dividends declared per common share	$ 0.25	$ 0.25