ACQUISITIONS - Unaudited Pro Forma Information (Details) - Pinnacle Foods Inc. (Pinnacle) - USD ($) $ in Millions	12 Months Ended
May 26, 2019	May 27, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma net sales	$ 10,788.1	$ 11,034.2
Pro forma net income from continuing operations attributable to Conagra Brands, Inc.	$ 803.8	$ 1,089.7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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