RESTRUCTURING ACTIVITIES - Schedule of restructuring plan expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		69 Months Ended
	Feb. 23, 2025	Feb. 25, 2024	Feb. 23, 2025	Feb. 25, 2024	Feb. 23, 2025
RESTRUCTURING ACTIVITIES
Restructuring plan charges			$ 90.7
Corporate, Non-Segment
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.7
Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges	$ 6.9	$ 1.5	90.7	$ 28.9	$ 310.2
Asset impairment (net of gains on disposal)			65.9
Balance			10.4
Costs Incurred and Charged to Expense			19.0
Costs Paid or Otherwise Settled			(16.9)
Changes in Estimates			(0.8)
Balance	11.7		11.7		11.7
Accelerated depreciation | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.2
Other cost of goods sold | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			7.4
Total cost of goods sold | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			9.6
Severance and related costs | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			8.3
Balance			9.8
Costs Incurred and Charged to Expense			9.1
Costs Paid or Otherwise Settled			(7.8)
Changes in Estimates			(0.8)
Balance	10.3		10.3		10.3
Severance and related costs | Conagra Restructuring Plan | Corporate, Non-Segment
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.4
Contract/lease termination | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			1.6
Costs Incurred and Charged to Expense			1.6
Costs Paid or Otherwise Settled			(1.6)
Contract/lease termination | Conagra Restructuring Plan | Corporate, Non-Segment
RESTRUCTURING ACTIVITIES
Restructuring plan charges			0.1
Other costs | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Balance			0.6
Costs Incurred and Charged to Expense			8.3
Costs Paid or Otherwise Settled			(7.5)
Balance	$ 1.4		1.4		$ 1.4
Other SG&A | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			5.3
Other SG&A | Conagra Restructuring Plan | Corporate, Non-Segment
RESTRUCTURING ACTIVITIES
Restructuring plan charges			0.2
Total SG&A | Conagra Restructuring Plan
RESTRUCTURING ACTIVITIES
Restructuring plan charges			81.1
Total SG&A | Conagra Restructuring Plan | Corporate, Non-Segment
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.7
Grocery & Snacks | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			10.8
Grocery & Snacks | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Asset impairment (net of gains on disposal)			2.7
Grocery & Snacks | Accelerated depreciation | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.2
Grocery & Snacks | Other cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.3
Grocery & Snacks | Total cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			4.5
Grocery & Snacks | Severance and related costs | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			0.1
Grocery & Snacks | Contract/lease termination | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			1.2
Grocery & Snacks | Other SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.3
Grocery & Snacks | Total SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			6.3
Refrigerated & Frozen | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			78.5
Refrigerated & Frozen | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Asset impairment (net of gains on disposal)			65.1
Refrigerated & Frozen | Other cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			5.2
Refrigerated & Frozen | Total cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			5.2
Refrigerated & Frozen | Severance and related costs | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			6.1
Refrigerated & Frozen | Other SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			2.1
Refrigerated & Frozen | Total SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			73.3
International | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			(1.3)
International | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Asset impairment (net of gains on disposal)			(1.9)
International | Other cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			(0.1)
International | Total cost of goods sold | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			(0.1)
International | Severance and related costs | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			(0.3)
International | Contract/lease termination | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			0.3
International | Other SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			0.7
International | Total SG&A | Conagra Restructuring Plan | Operating Segments
RESTRUCTURING ACTIVITIES
Restructuring plan charges			$ (1.2)