Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	May 26, 2019	May 27, 2018	May 28, 2017
Income Statement [Abstract]
Net sales	$ 9,538.4	$ 7,938.3	$ 7,826.9
Costs and expenses:
Cost of goods sold	6,885.4	5,586.8	5,483.1
Selling, general and administrative expenses	1,473.4	1,398.4	1,474.0
Pension and postretirement non-service income	(35.1)	(80.4)	(55.2)
Interest expense, net	391.4	158.7	195.5
Income from continuing operations before income taxes and equity method investment earnings	823.3	874.8	729.5
Income tax expense	218.8	174.6	254.7
Equity method investment earnings	75.8	97.3	71.2
Income from continuing operations	680.3	797.5	546.0
Income (loss) from discontinued operations, net of tax	(1.9)	14.3	102.0
Net income	678.4	811.8	648.0
Less: Net income attributable to noncontrolling interests	0.1	3.4	8.7
Net income attributable to Conagra Brands, Inc.	$ 678.3	$ 808.4	$ 639.3
Earnings per share — basic
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 1.53	$ 1.97	$ 1.26
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	0.00	0.03	0.22
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	1.53	2.00	1.48
Earnings per share — diluted
Income from continuing operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	1.53	1.95	1.25
Income from discontinued operations attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	(0.01)	0.03	0.21
Net income attributable to Conagra Brands, Inc. common stockholders (in dollars per share)	$ 1.52	$ 1.98	$ 1.46