Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Aug. 30, 2015	Aug. 24, 2014
Income Statement [Abstract]
Net sales	$ 2,793.8	$ 2,763.0
Costs and expenses:
Cost of goods sold	2,093.0	2,172.2
Selling, general and administrative expenses	405.4	393.8
Interest expense, net	80.3	83.3
Income from continuing operations before income taxes and equity method investment earnings	215.1	113.7
Income tax expense	84.9	43.1
Equity method investment earnings	37.0	25.6
Income from continuing operations	167.2	96.2
Income (loss) from discontinued operations, net of tax	(1,319.6)	388.3
Net income (loss)	(1,152.4)	484.5
Less: Net income attributable to noncontrolling interests	1.7	2.2
Net income (loss) attributable to ConAgra Foods, Inc.	$ (1,154.1)	$ 482.3
Earnings (loss) per share — basic
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per shares)	$ 0.38	$ 0.22
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(3.06)	0.92
Net income (loss) attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(2.68)	1.14
Earnings (loss) per share — diluted
Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	0.38	0.22
Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(3.03)	0.90
Net income (loss) attributable to ConAgra Foods, Inc. common stockholders (in dollars per share)	(2.65)	1.12
Cash dividends declared per common share (in dollars per share)	$ 0.25	$ 0.25