Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
	Aug. 30, 2020	Aug. 25, 2019
Income Statement [Abstract]
Net sales	$ 2,678.9	$ 2,390.7
Costs and expenses:
Cost of goods sold	1,868.7	1,726.2
Selling, general and administrative expenses	300.3	400.8
Pension and postretirement non-service income	(13.8)	(9.5)
Interest expense, net	113.7	122.7
Income before income taxes and equity method investment earnings	410.0	150.5
Income tax expense (benefit)	86.7	(11.5)
Equity method investment earnings	6.5	12.3
Net income	329.8	174.3
Less: Net income attributable to noncontrolling interests	0.8	0.5
Net income attributable to Conagra Brands, Inc.	$ 329.0	$ 173.8
Earnings per share — basic
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.67	$ 0.36
Earnings per share — diluted
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.67	$ 0.36