Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 26, 2017	Nov. 27, 2016	Nov. 26, 2017	Nov. 27, 2016
Income Statement [Abstract]
Net sales	$ 2,173.4	$ 2,088.4	$ 3,977.6	$ 3,984.0
Costs and expenses:
Cost of goods sold	1,515.1	1,440.9	2,800.3	2,791.9
Selling, general and administrative expenses	307.3	417.9	546.3	649.6
Interest expense, net	38.0	54.1	74.4	112.3
Income from continuing operations before income taxes and equity method investment earnings	313.0	175.5	556.6	430.2
Income tax expense	109.5	78.4	229.5	247.6
Equity method investment earnings	20.6	17.2	50.6	30.3
Income from continuing operations	224.1	114.3	377.7	212.9
Income from discontinued operations, net of tax	0.4	11.6	0.1	103.0
Net income	224.5	125.9	377.8	315.9
Less: Net income attributable to noncontrolling interests	1.0	3.8	1.8	7.6
Net income attributable to Conagra Brands, Inc.	$ 223.5	$ 122.1	$ 376.0	$ 308.3
Earnings per share — basic
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.55	$ 0.26	$ 0.91	$ 0.48
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.00	0.02	0.00	0.22
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.55	0.28	0.91	0.70
Earnings per share — diluted
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.54	0.26	0.91	0.48
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.00	0.02	0.00	0.22
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.54	0.28	0.91	0.70
Cash dividends declared per common share (in dollars per share)	$ 0.2125	$ 0.25	$ 0.425	$ 0.50