Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 25, 2018	Feb. 26, 2017	Feb. 25, 2018	Feb. 26, 2017
Income Statement [Abstract]
Net sales	$ 1,994.5	$ 1,981.2	$ 5,972.1	$ 5,965.2
Costs and expenses:
Cost of goods sold	1,395.7	1,360.2	4,196.0	4,152.1
Selling, general and administrative expenses	330.2	349.7	876.5	999.3
Interest expense, net	39.8	45.7	114.2	158.0
Income from continuing operations before income taxes and equity method investment earnings	228.8	225.6	785.4	655.8
Income tax expense (benefit)	(91.4)	67.9	138.1	315.5
Equity method investment earnings	29.0	21.8	79.6	52.1
Income from continuing operations	349.2	179.5	726.9	392.4
Income from discontinued operations, net of tax	14.5	0.7	14.6	103.7
Net income	363.7	180.2	741.5	496.1
Less: Net income attributable to noncontrolling interests	0.9	0.5	2.7	8.1
Net income attributable to Conagra Brands, Inc.	$ 362.8	$ 179.7	$ 738.8	$ 488.0
Earnings per share — basic
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.87	$ 0.41	$ 1.78	$ 0.90
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.04	0.01	0.03	0.22
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.91	0.42	1.81	1.12
Earnings per share — diluted
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.87	0.41	1.76	0.89
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.03	0.00	0.04	0.22
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.90	0.41	1.80	1.11
Cash dividends declared per common share (in dollars per share)	$ 0.2125	$ 0.20	$ 0.6375	$ 0.70