Note 3 - Restructuring Activities - Restructuring Plan Expenses (Details) $ in Millions	Aug. 27, 2023 USD ($)
Restructuring and related costs	$ 27.4
Corporate, Non-Segment [Member]
Restructuring and related costs	0.1
Accelerated Depreciation Related To Cost Of Goods Sold [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	6.1
Accelerated Depreciation Related To Cost Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Other Cost of Goods Sold [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.9
Other Cost of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Costs Of Goods Sold [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	7.0
Costs Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Severance And Related Costs [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	4.8
Severance And Related Costs [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Asset Impairment Net Of Gains On Disposal [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	14.7
Asset Impairment Net Of Gains On Disposal [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Consulting And Professional Fees [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.2
Consulting And Professional Fees [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.0
Other Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.7
Other Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.1
Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	20.4
Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member] | Corporate, Non-Segment [Member]
Restructuring and related costs	0.1
Grocery And Snacks [Member]
Restructuring and related costs	7.4
Grocery And Snacks [Member] | Accelerated Depreciation Related To Cost Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	5.9
Grocery And Snacks [Member] | Other Cost of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
Grocery And Snacks [Member] | Costs Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	5.9
Grocery And Snacks [Member] | Severance And Related Costs [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.7
Grocery And Snacks [Member] | Asset Impairment Net Of Gains On Disposal [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.6
Grocery And Snacks [Member] | Consulting And Professional Fees [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.2
Grocery And Snacks [Member] | Other Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.0
Grocery And Snacks [Member] | Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	1.5
Refrigerated And Frozen [Member]
Restructuring and related costs	0.8
Refrigerated And Frozen [Member] | Accelerated Depreciation Related To Cost Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.2
Refrigerated And Frozen [Member] | Other Cost of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
Refrigerated And Frozen [Member] | Costs Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.2
Refrigerated And Frozen [Member] | Severance And Related Costs [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
Refrigerated And Frozen [Member] | Asset Impairment Net Of Gains On Disposal [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
Refrigerated And Frozen [Member] | Consulting And Professional Fees [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
Refrigerated And Frozen [Member] | Other Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.6
Refrigerated And Frozen [Member] | Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.6
International [Member]
Restructuring and related costs	19.1
International [Member] | Accelerated Depreciation Related To Cost Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
International [Member] | Other Cost of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.9
International [Member] | Costs Of Goods Sold [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.9
International [Member] | Severance And Related Costs [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	4.1
International [Member] | Asset Impairment Net Of Gains On Disposal [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	14.1
International [Member] | Consulting And Professional Fees [Member] | Conagra Restructuring Plan [Member] | Operating Segments [Member]
Restructuring and related costs	0.0
International [Member] | Other Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	0.0
International [Member] | Selling, General and Administrative Expenses [Member] | Conagra Restructuring Plan [Member]
Restructuring and related costs	$ 18.2