Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 29, 2015	Nov. 23, 2014	Nov. 29, 2015	Nov. 23, 2014
Income Statement [Abstract]
Net sales	$ 3,092.7	$ 3,136.4	$ 5,886.5	$ 5,899.4
Costs and expenses:
Cost of goods sold	2,264.7	2,379.1	4,357.7	4,551.3
Selling, general and administrative expenses	524.7	392.0	930.1	785.8
Interest expense, net	79.6	78.7	159.9	162.0
Income from continuing operations before income taxes and equity method investment earnings	223.7	286.6	438.8	400.3
Income tax expense	83.2	101.9	168.1	145.0
Equity method investment earnings	25.3	34.0	62.3	59.6
Income from continuing operations	165.8	218.7	333.0	314.9
Income (loss) from discontinued operations, net of tax	(6.5)	(202.8)	(1,326.1)	185.5
Net income (loss)	159.3	15.9	(993.1)	500.4
Less: Net income attributable to noncontrolling interests	4.4	5.9	6.1	8.1
Net income (loss) attributable to ConAgra Foods, Inc.	$ 154.9	$ 10.0	$ (999.2)	$ 492.3
Earnings (loss) per share — basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	$ 0.37	$ 0.50	$ 0.75	$ 0.72
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(0.01)	(0.48)	(3.06)	0.44
Net income (loss) attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	0.36	0.02	(2.31)	1.16
Earnings (loss) per share — diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	0.37	0.49	0.75	0.71
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(0.02)	(0.47)	(3.04)	0.43
Net income (loss) attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	0.35	0.02	(2.29)	1.14
Cash dividends declared per common share (in dollars per share)	$ 0.25	$ 0.25	$ 0.5	$ 0.5