RESTRUCTURING ACTIVITIES - Schedule of Pre-Tax Expenses in Association with the Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		31 Months Ended	33 Months Ended
	Aug. 29, 2021	Aug. 30, 2020	Aug. 29, 2021	Aug. 29, 2021
Pinnacle Integration Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	$ 357.0		$ 357.0	$ 357.0
Recognized pre-tax expenses	7.3	$ 8.6		281.0
Pinnacle Integration Restructuring Plan | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	56.3		56.3	56.3
Recognized pre-tax expenses	0.2			8.7
Pinnacle Integration Restructuring Plan | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	31.9		31.9	31.9
Recognized pre-tax expenses	0.9			16.9
Pinnacle Integration Restructuring Plan | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	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	264.7		264.7	264.7
Recognized pre-tax expenses	6.2			251.3
Pinnacle Integration Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	12.2		12.2	12.2
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	7.6		7.6	7.6
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
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	11.6		11.6	11.6
Recognized pre-tax expenses	0.1			6.0
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
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	7.1		7.1	7.1
Recognized pre-tax expenses	0.1			3.0
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
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	23.8		23.8	23.8
Recognized pre-tax expenses	0.1			11.2
Pinnacle Integration Restructuring Plan | Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.4		11.4	11.4
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	11.7		11.7	11.7
Recognized pre-tax expenses	0.1			7.6
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
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	117.2		117.2	117.2
Recognized pre-tax expenses	(0.2)			117.1
Pinnacle Integration Restructuring Plan | Severance and related costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	3.5		3.5	3.5
Recognized pre-tax expenses				3.4
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
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
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	36.9		36.9	36.9
Recognized pre-tax expenses				6.9
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	30.3		30.3	30.3
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	4.0		4.0	4.0
Recognized pre-tax expenses				4.0
Pinnacle Integration Restructuring Plan | Asset impairment (net of gains on disposal) | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	2.6		2.6	2.6
Recognized pre-tax expenses				2.6
Pinnacle Integration Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	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
Recognized pre-tax expenses				7.4
Pinnacle Integration Restructuring Plan | Contract/lease termination
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	32.8		32.8	32.8
Recognized pre-tax expenses	0.2			18.7
Pinnacle Integration Restructuring Plan | Contract/lease termination | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	7.7		7.7	7.7
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	8.2		8.2	8.2
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
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	16.1		16.1	16.1
Recognized pre-tax expenses	0.2			16.1
Pinnacle Integration Restructuring Plan | Consulting/professional fees
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	107.5		107.5	107.5
Recognized pre-tax expenses	5.8			96.8
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
Recognized pre-tax expenses	0.1			0.8
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
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	105.7		105.7	105.7
Recognized pre-tax expenses	5.7			95.2
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
Recognized pre-tax expenses	1.4			22.9
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	5.9		5.9	5.9
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	4.5		4.5	4.5
Recognized pre-tax expenses	0.8			1.9
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
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
Recognized pre-tax expenses	0.5			17.8
Pinnacle Integration Restructuring Plan | Total selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	333.2		333.2	333.2
Recognized pre-tax expenses	7.2			269.8
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	44.9		44.9	44.9
Recognized pre-tax expenses	0.2			5.8
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	20.2		20.2	20.2
Recognized pre-tax expenses	0.8			9.3
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
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	264.7		264.7	264.7
Recognized pre-tax expenses	6.2			251.3
Conagra Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	144.7		144.7	144.7
Recognized pre-tax expenses	8.5	$ 17.3	121.3
Conagra Restructuring Plan | Accelerated depreciation
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	73.8		73.8	73.8
Recognized pre-tax expenses	6.3		65.0
Conagra Restructuring Plan | Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	34.7		34.7	34.7
Recognized pre-tax expenses	1.0		33.0
Conagra Restructuring Plan | Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	39.1		39.1	39.1
Recognized pre-tax expenses	5.3		32.0
Conagra Restructuring Plan | Other cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	10.2		10.2	10.2
Recognized pre-tax expenses			5.0
Conagra Restructuring Plan | Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	8.9		8.9	8.9
Recognized pre-tax expenses			4.8
Conagra Restructuring Plan | Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.3		1.3	1.3
Recognized pre-tax expenses			0.2
Conagra Restructuring Plan | Total cost of goods sold
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	84.0		84.0	84.0
Recognized pre-tax expenses	6.3		70.0
Conagra Restructuring Plan | Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	43.6		43.6	43.6
Recognized pre-tax expenses	1.0		37.8
Conagra Restructuring Plan | Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	40.4		40.4	40.4
Recognized pre-tax expenses	5.3		32.2
Conagra Restructuring Plan | Severance and related costs
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	17.7		17.7	17.7
Recognized pre-tax expenses	1.0		16.4
Conagra Restructuring Plan | Severance and related costs | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	12.6		12.6	12.6
Recognized pre-tax expenses	1.7		12.1
Conagra Restructuring Plan | Severance and related costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.1		1.1	1.1
Recognized pre-tax expenses	(1.2)		0.6
Conagra Restructuring Plan | Severance and related costs | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.1		1.1	1.1
Recognized pre-tax expenses			1.1
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
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	2.6		2.6	2.6
Recognized pre-tax expenses	0.2		2.3
Conagra Restructuring Plan | Asset impairment (net of gains on disposal)
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	27.3		27.3	27.3
Recognized pre-tax expenses	(0.2)		27.3
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	26.9		26.9	26.9
Recognized pre-tax expenses	(0.2)		26.9
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	0.3		0.3	0.3
Recognized pre-tax expenses			0.3
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
Recognized pre-tax expenses			0.1
Conagra Restructuring Plan | Contract/lease termination
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.3		0.3	0.3
Recognized pre-tax expenses			0.1
Conagra Restructuring Plan | Contract/lease termination | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.1		0.1	0.1
Conagra Restructuring Plan | Contract/lease termination | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.2		0.2	0.2
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
Conagra Restructuring Plan | Consulting/professional fees | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	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	13.9		13.9	13.9
Recognized pre-tax expenses	1.4		6.9
Conagra Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	11.1		11.1	11.1
Recognized pre-tax expenses	1.4		6.4
Conagra Restructuring Plan | Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	2.6		2.6	2.6
Recognized pre-tax expenses			0.3
Conagra Restructuring Plan | Other selling, general and administrative expenses | Corporate
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	0.2		0.2	0.2
Recognized pre-tax expenses			0.2
Conagra Restructuring Plan | Total selling, general and administrative expenses
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	60.1		60.1	60.1
Recognized pre-tax expenses	2.2		50.7
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	50.7		50.7	50.7
Recognized pre-tax expenses	2.9		45.4
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	4.0		4.0	4.0
Recognized pre-tax expenses	(1.2)		1.2
Conagra Restructuring Plan | Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.2		1.2	1.2
Recognized pre-tax expenses			1.2
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
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	3.9		3.9	3.9
Recognized pre-tax expenses	0.2		2.6
Conagra Restructuring Plan | Total
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	144.1		144.1	144.1
Recognized pre-tax expenses	8.5		120.7
Conagra Restructuring Plan | Total | Reporting segments | Grocery & Snacks
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	94.3		94.3	94.3
Recognized pre-tax expenses	3.9		83.2
Conagra Restructuring Plan | Total | Reporting segments | Refrigerated & Frozen
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	44.4		44.4	44.4
Recognized pre-tax expenses	4.1		33.4
Conagra Restructuring Plan | Total | Reporting segments | International
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	1.2		1.2	1.2
Recognized pre-tax expenses			1.2
Conagra Restructuring Plan | Total | Reporting segments | Foodservice
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	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	3.9		3.9	3.9
Recognized pre-tax expenses	0.2		2.6
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
Recognized pre-tax expenses			$ 0.6