RESTRUCTURING ACTIVITIES - Schedule of Pre-Tax Expenses in Association with the Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		37 Months Ended	39 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Feb. 27, 2022	Feb. 28, 2021	Feb. 27, 2022	Feb. 27, 2022
Pinnacle Integration Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	$ 341.0		$ 341.0		$ 341.0	$ 341.0
Recognized pre-tax expenses	0.2	$ 5.4	13.3	$ 24.2		287.0
Pinnacle Integration Restructuring Plan | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	50.0		50.0		50.0	50.0
Recognized pre-tax expenses			0.3			8.8
Pinnacle Integration Restructuring Plan | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	22.9		22.9		22.9	22.9
Recognized pre-tax expenses	(4.3)		(1.3)			14.7
Pinnacle Integration Restructuring Plan | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.1		4.1		4.1	4.1
Recognized pre-tax expenses						4.1
Pinnacle Integration Restructuring Plan | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	264.0		264.0		264.0	264.0
Recognized pre-tax expenses	4.5		14.3			259.4
Pinnacle Integration Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	9.8		9.8		9.8	9.8
Recognized pre-tax expenses						5.2
Pinnacle Integration Restructuring Plan | Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	5.2		5.2		5.2	5.2
Recognized pre-tax expenses						0.6
Pinnacle Integration Restructuring Plan | Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.6		4.6		4.6	4.6
Recognized pre-tax expenses						4.6
Pinnacle Integration Restructuring Plan | Other cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.5		11.5		11.5	11.5
Recognized pre-tax expenses	0.4		1.9			7.8
Pinnacle Integration Restructuring Plan | Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	3.8		3.8		3.8	3.8
Recognized pre-tax expenses						2.3
Pinnacle Integration Restructuring Plan | Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	7.0		7.0		7.0	7.0
Recognized pre-tax expenses	0.4		1.9			4.8
Pinnacle Integration Restructuring Plan | Other cost of goods sold | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.7		0.7		0.7	0.7
Recognized pre-tax expenses						0.7
Pinnacle Integration Restructuring Plan | Total cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	21.3		21.3		21.3	21.3
Recognized pre-tax expenses	0.4		1.9			13.0
Pinnacle Integration Restructuring Plan | Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	9.0		9.0		9.0	9.0
Recognized pre-tax expenses						2.9
Pinnacle Integration Restructuring Plan | Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.6		11.6		11.6	11.6
Recognized pre-tax expenses	0.4		1.9			9.4
Pinnacle Integration Restructuring Plan | Total cost of goods sold | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.7		0.7		0.7	0.7
Recognized pre-tax expenses						0.7
Pinnacle Integration Restructuring Plan | Severance and related costs
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	118.0		118.0		118.0	118.0
Recognized pre-tax expenses	0.5		0.7			118.0
Pinnacle Integration Restructuring Plan | Severance and related costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.3		4.3		4.3	4.3
Recognized pre-tax expenses	0.5		0.9			4.3
Pinnacle Integration Restructuring Plan | Severance and related costs | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.5		1.5		1.5	1.5
Recognized pre-tax expenses						1.5
Pinnacle Integration Restructuring Plan | Severance and related costs | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	112.2		112.2		112.2	112.2
Recognized pre-tax expenses			(0.2)			112.2
Pinnacle Integration Restructuring Plan | Asset impairment (net of gains on disposal)
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	28.9		28.9		28.9	28.9
Recognized pre-tax expenses						1.4
Pinnacle Integration Restructuring Plan | Asset impairment (net of gains on disposal) | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	27.8		27.8		27.8	27.8
Recognized pre-tax expenses						0.3
Pinnacle Integration Restructuring Plan | Asset impairment (net of gains on disposal) | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	(1.4)		(1.4)		(1.4)	(1.4)
Recognized pre-tax expenses						(1.4)
Pinnacle Integration Restructuring Plan | Asset impairment (net of gains on disposal) | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	2.5		2.5		2.5	2.5
Recognized pre-tax expenses						2.5
Pinnacle Integration Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	7.4		7.4		7.4	7.4
Recognized pre-tax expenses						7.4
Pinnacle Integration Restructuring Plan | Accelerated depreciation | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	7.4		7.4		7.4	7.4
Recognized pre-tax expenses						7.4
Pinnacle Integration Restructuring Plan | Contract/lease termination
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	26.4		26.4		26.4	26.4
Recognized pre-tax expenses	(0.7)		(0.5)			18.0
Pinnacle Integration Restructuring Plan | Contract/lease termination | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	6.5		6.5		6.5	6.5
Recognized pre-tax expenses						1.8
Pinnacle Integration Restructuring Plan | Contract/lease termination | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	3.7		3.7		3.7	3.7
Pinnacle Integration Restructuring Plan | Contract/lease termination | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.8		0.8		0.8	0.8
Recognized pre-tax expenses						0.8
Pinnacle Integration Restructuring Plan | Contract/lease termination | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	15.4		15.4		15.4	15.4
Recognized pre-tax expenses	(0.7)		(0.5)			15.4
Pinnacle Integration Restructuring Plan | Consulting/professional fees
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	107.6		107.6		107.6	107.6
Recognized pre-tax expenses	4.9		13.5			104.5
Pinnacle Integration Restructuring Plan | Consulting/professional fees | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.0		1.0		1.0	1.0
Recognized pre-tax expenses			0.2			0.9
Pinnacle Integration Restructuring Plan | Consulting/professional fees | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.8		0.8		0.8	0.8
Recognized pre-tax expenses						0.8
Pinnacle Integration Restructuring Plan | Consulting/professional fees | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	105.8		105.8		105.8	105.8
Recognized pre-tax expenses	4.9		13.3			102.8
Pinnacle Integration Restructuring Plan | Other selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	31.4		31.4		31.4	31.4
Recognized pre-tax expenses	0.6		3.2			24.7
Pinnacle Integration Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	5.7		5.7		5.7	5.7
Recognized pre-tax expenses			0.1			2.9
Pinnacle Integration Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.7		4.7		4.7	4.7
Recognized pre-tax expenses	0.3		1.3			2.4
Pinnacle Integration Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3		0.3	0.3
Recognized pre-tax expenses						0.3
Pinnacle Integration Restructuring Plan | Other selling, general and administrative expenses | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	20.7		20.7		20.7	20.7
Recognized pre-tax expenses	0.3		1.8			19.1
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	319.7		319.7		319.7	319.7
Recognized pre-tax expenses	(0.2)		11.4			274.0
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	41.0		41.0		41.0	41.0
Recognized pre-tax expenses			0.3			5.9
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.3		11.3		11.3	11.3
Recognized pre-tax expenses	(4.7)		(3.2)			5.3
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	3.4		3.4		3.4	3.4
Recognized pre-tax expenses						3.4
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	264.0		264.0		264.0	264.0
Recognized pre-tax expenses	4.5		14.3			259.4
Pinnacle Integration Restructuring Plan | Asset gains on disposal (net of impairment)
Restructuring Cost And Reserve [Line Items]
Recognized pre-tax expenses	(5.5)		(5.5)
Pinnacle Integration Restructuring Plan | Asset gains on disposal (net of impairment) | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Recognized pre-tax expenses	(5.5)		(5.4)
Pinnacle Integration Restructuring Plan | Asset gains on disposal (net of impairment) | Corporate
Restructuring Cost And Reserve [Line Items]
Recognized pre-tax expenses			(0.1)
Conagra Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	148.4		148.4		148.4	148.4
Recognized pre-tax expenses	10.5	$ 10.0	25.6	$ 37.8	138.4
Conagra Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	73.1		73.1		73.1	73.1
Recognized pre-tax expenses	2.6		13.6		72.3
Conagra Restructuring Plan | Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	33.2		33.2		33.2	33.2
Recognized pre-tax expenses			1.2		33.2
Conagra Restructuring Plan | Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	39.9		39.9		39.9	39.9
Recognized pre-tax expenses	2.6		12.4		39.1
Conagra Restructuring Plan | Other cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	12.8		12.8		12.8	12.8
Recognized pre-tax expenses	2.6		6.4		11.4
Conagra Restructuring Plan | Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	8.8		8.8		8.8	8.8
Recognized pre-tax expenses	0.3		4.0		8.8
Conagra Restructuring Plan | Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.0		4.0		4.0	4.0
Recognized pre-tax expenses	2.3		2.4		2.6
Conagra Restructuring Plan | Total cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	85.9		85.9		85.9	85.9
Recognized pre-tax expenses	5.2		20.0		83.7
Conagra Restructuring Plan | Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	42.0		42.0		42.0	42.0
Recognized pre-tax expenses	0.3		5.2		42.0
Conagra Restructuring Plan | Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	43.9		43.9		43.9	43.9
Recognized pre-tax expenses	4.9		14.8		41.7
Conagra Restructuring Plan | Severance and related costs
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	19.3		19.3		19.3	19.3
Recognized pre-tax expenses	2.7		3.2		18.6
Conagra Restructuring Plan | Severance and related costs | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.6		11.6		11.6	11.6
Recognized pre-tax expenses	(0.1)		1.2		11.6
Conagra Restructuring Plan | Severance and related costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.2		1.2		1.2	1.2
Recognized pre-tax expenses	0.4		(0.8)		1.0
Conagra Restructuring Plan | Severance and related costs | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.3		1.3		1.3	1.3
Recognized pre-tax expenses	0.2		0.2		1.3
Conagra Restructuring Plan | Severance and related costs | Reporting segments | Foodservice
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3		0.3	0.3
Recognized pre-tax expenses			0.3		0.3
Conagra Restructuring Plan | Severance and related costs | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.9		4.9		4.9	4.9
Recognized pre-tax expenses	2.2		2.3		4.4
Conagra Restructuring Plan | Asset impairment (net of gains on disposal)
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	24.0		24.0		24.0	24.0
Recognized pre-tax expenses	0.2		(3.5)		24.0
Conagra Restructuring Plan | Asset impairment (net of gains on disposal) | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	23.5		23.5		23.5	23.5
Recognized pre-tax expenses	0.2		(3.6)		23.5
Conagra Restructuring Plan | Asset impairment (net of gains on disposal) | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.4		0.4		0.4	0.4
Recognized pre-tax expenses			0.1		0.4
Conagra Restructuring Plan | Asset impairment (net of gains on disposal) | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.1		0.1		0.1	0.1
Recognized pre-tax expenses					0.1
Conagra Restructuring Plan | Contract/lease termination
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	3.1		3.1		3.1	3.1
Recognized pre-tax expenses			0.1		0.2
Conagra Restructuring Plan | Contract/lease termination | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.4		0.4		0.4	0.4
Recognized pre-tax expenses			0.1		0.1
Conagra Restructuring Plan | Contract/lease termination | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	2.6		2.6		2.6	2.6
Conagra Restructuring Plan | Contract/lease termination | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.1		0.1		0.1	0.1
Recognized pre-tax expenses					0.1
Conagra Restructuring Plan | Consulting/professional fees
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.9		0.9		0.9	0.9
Conagra Restructuring Plan | Consulting/professional fees | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.9		0.9		0.9	0.9
Conagra Restructuring Plan | Other selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	14.6		14.6		14.6	14.6
Recognized pre-tax expenses	2.4		5.8		11.3
Conagra Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.6		11.6		11.6	11.6
Recognized pre-tax expenses	2.2		5.5		10.5
Conagra Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	2.7		2.7		2.7	2.7
Recognized pre-tax expenses	0.2		0.2		0.5
Conagra Restructuring Plan | Other selling, general and administrative expenses | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3		0.3	0.3
Recognized pre-tax expenses			0.1		0.3
Conagra Restructuring Plan | Total selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	61.9		61.9		61.9	61.9
Recognized pre-tax expenses	5.3		5.6		54.1
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	47.1		47.1		47.1	47.1
Recognized pre-tax expenses	2.3		3.2		45.7
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	6.9		6.9		6.9	6.9
Recognized pre-tax expenses	0.6		(0.5)		1.9
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.4		1.4		1.4	1.4
Recognized pre-tax expenses	0.2		0.2		1.4
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3		0.3	0.3
Recognized pre-tax expenses			0.3		0.3
Conagra Restructuring Plan | Total selling, general and administrative expenses | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	6.2		6.2		6.2	6.2
Recognized pre-tax expenses	2.2		2.4		4.8
Conagra Restructuring Plan | Total
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	147.8		147.8		147.8	147.8
Recognized pre-tax expenses	10.5		25.6		137.8
Conagra Restructuring Plan | Total | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	89.1		89.1		89.1	89.1
Recognized pre-tax expenses	2.6		8.4		87.7
Conagra Restructuring Plan | Total | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	50.8		50.8		50.8	50.8
Recognized pre-tax expenses	5.5		14.3		43.6
Conagra Restructuring Plan | Total | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.4		1.4		1.4	1.4
Recognized pre-tax expenses	0.2		0.2		1.4
Conagra Restructuring Plan | Total | Reporting segments | Foodservice
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3		0.3	0.3
Recognized pre-tax expenses			0.3		0.3
Conagra Restructuring Plan | Total | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	6.2		6.2		6.2	6.2
Recognized pre-tax expenses	2.2		2.4		4.8
Conagra Restructuring Plan | Pension And Postretirement Nonservice Cost Income
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	$ 0.6		$ 0.6		0.6	$ 0.6
Recognized pre-tax expenses					$ 0.6