Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 25, 2018	Nov. 26, 2017	Nov. 25, 2018	Nov. 26, 2017
Income Statement [Abstract]
Net sales	$ 2,383.7	$ 2,173.4	$ 4,218.1	$ 3,977.6
Costs and expenses:
Cost of goods sold	1,706.5	1,515.1	3,025.4	2,800.3
Selling, general and administrative expenses	487.3	324.8	744.6	584.4
Pension and postretirement non-service income	(9.7)	(17.5)	(19.9)	(38.1)
Interest expense, net	80.6	38.0	129.6	74.4
Income from continuing operations before income taxes and equity method investment earnings	119.0	313.0	338.4	556.6
Income tax expense	22.4	109.5	79.8	229.5
Equity method investment earnings	37.7	20.6	53.9	50.6
Income from continuing operations	134.3	224.1	312.5	377.7
Income (loss) from discontinued operations, net of tax	(1.9)	0.4	(1.9)	0.1
Net income	132.4	224.5	310.6	377.8
Less: Net income attributable to noncontrolling interests	0.8	1.0	0.8	1.8
Net income attributable to Conagra Brands, Inc.	$ 131.6	$ 223.5	$ 309.8	$ 376.0
Earnings per share — basic
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.32	$ 0.55	$ 0.76	$ 0.91
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	(0.01)	0.00	0.00	0.00
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.31	0.55	0.76	0.91
Earnings per share — diluted
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.32	0.54	0.76	0.91
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	(0.01)	0.00	0.00	0.00
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 0.31	$ 0.54	$ 0.76	$ 0.91