Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 29, 2020
Income Statement [Abstract]
Net sales	$ 3,058.9	$ 2,995.2	$ 5,712.2	$ 5,674.1
Costs and expenses:
Cost of goods sold	2,304.1	2,106.3	4,284.0	3,975.0
Selling, general and administrative expenses	345.4	357.7	655.5	658.0
Pension and postretirement non-service income	(16.1)	(13.7)	(32.2)	(27.5)
Interest expense, net	94.9	107.7	189.1	221.4
Income before income taxes and equity method investment earnings	330.6	437.2	615.8	847.2
Income tax expense	84.2	80.7	153.9	167.4
Equity method investment earnings	29.5	23.0	49.7	29.5
Net income	275.9	379.5	511.6	709.3
Less: Net income attributable to noncontrolling interests	0.4	0.6	0.7	1.4
Net income attributable to Conagra Brands, Inc.	$ 275.5	$ 378.9	$ 510.9	$ 707.9
Earnings per share — basic
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.57	$ 0.77	$ 1.06	$ 1.45
Earnings per share — diluted
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.57	$ 0.77	$ 1.06	$ 1.44