Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2020	Feb. 24, 2019	Feb. 23, 2020	Feb. 24, 2019
Income Statement [Abstract]
Net sales	$ 2,555.0	$ 2,707.1	$ 7,766.5	$ 6,925.2
Costs and expenses:
Cost of goods sold	1,870.6	1,954.8	5,619.7	4,980.2
Selling, general and administrative expenses	319.9	334.1	1,090.5	1,078.7
Pension and postretirement non-service income	(16.4)	(9.8)	(37.2)	(29.7)
Interest expense, net	117.7	130.9	361.8	260.5
Income from continuing operations before income taxes and equity method investment earnings	263.2	297.1	731.7	635.5
Income tax expense	68.9	67.2	141.5	147.0
Equity method investment earnings	10.4	12.7	50.3	66.6
Income from continuing operations	204.7	242.6	640.5	555.1
Loss from discontinued operations, net of tax	0.0	0.0	0.0	(1.9)
Net income	204.7	242.6	640.5	553.2
Less: Net income attributable to noncontrolling interests	0.3	0.6	1.8	1.4
Net income attributable to Conagra Brands, Inc.	$ 204.4	$ 242.0	$ 638.7	$ 551.8
Earnings per share — basic
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders	$ 0.42	$ 0.50	$ 1.31	$ 1.28
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders	0	0	0	0
Net income attributable to Conagra Brands, Inc. common stockholders	0.42	0.50	1.31	1.28
Earnings per share — diluted
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders	0.42	0.50	1.31	1.28
Loss from discontinued operations attributable to Conagra Brands, Inc. common stockholders	0	0	0	(0.01)
Net income attributable to Conagra Brands, Inc. common stockholders	$ 0.42	$ 0.50	$ 1.31	$ 1.27