Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2019	Aug. 26, 2018
Income Statement [Abstract]
Net sales	$ 2,390.7	$ 1,834.4
Costs and expenses:
Cost of goods sold	1,726.2	1,318.9
Selling, general and administrative expenses	400.8	257.3
Pension and postretirement non-service income	(9.5)	(10.2)
Interest expense, net	122.7	49.0
Income before income taxes and equity method investment earnings	150.5	219.4
Income tax expense (benefit)	(11.5)	57.4
Equity method investment earnings	12.3	16.2
Net income	174.3	178.2
Less: Net income attributable to noncontrolling interests	0.5	0.0
Net income attributable to Conagra Brands, Inc.	$ 173.8	$ 178.2
Earnings per share — basic
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.36	$ 0.45
Earnings per share — diluted
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.36	$ 0.45