Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
	Aug. 29, 2021	Aug. 30, 2020
Income Statement [Abstract]
Net sales	$ 2,653.3	$ 2,678.9
Costs and expenses:
Cost of goods sold	1,979.9	1,868.7
Selling, general and administrative expenses	310.1	300.3
Pension and postretirement non-service income	(16.1)	(13.8)
Interest expense, net	94.2	113.7
Income before income taxes and equity method investment earnings	285.2	410.0
Income tax expense	69.7	86.7
Equity method investment earnings	20.2	6.5
Net income	235.7	329.8
Less: Net income attributable to noncontrolling interests	0.3	0.8
Net income attributable to Conagra Brands, Inc.	$ 235.4	$ 329.0
Earnings per share — basic
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.49	$ 0.67
Earnings per share — diluted
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.49	$ 0.67