RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		22 Months Ended	24 Months Ended
	Nov. 29, 2020	Nov. 24, 2019	Nov. 29, 2020	Nov. 24, 2019	Nov. 29, 2020	Nov. 29, 2020
Pinnacle Integration Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	$ 360.0		$ 360.0		$ 360.0	$ 360.0
Cash charges incurred or expected to be incurred	281.2		281.2		281.2	281.2
Non-cash charges incurred or expected to be incurred	78.8		78.8		78.8	78.8
Recognized charges	10.2	$ 16.2	18.8	$ 43.9		260.8
Charges that have resulted or will result in cash outflows	9.3		17.6
Non-cash charges	0.9		1.2
Charges that have resulted or will result in cash outflows						230.0
Non-cash charges						30.8
Conagra Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	156.2		156.2		156.2	156.2
Cash charges incurred or expected to be incurred	36.8		36.8		36.8	36.8
Non-cash charges incurred or expected to be incurred	119.4		119.4		119.4	119.4
Recognized charges	10.5	$ 19.6	27.8	$ 40.7	94.4
Charges that have resulted or will result in cash outflows	1.9		6.9
Non-cash charges	8.6		20.9
Charges that have resulted or will result in cash outflows					19.7
Non-cash charges					74.7
Charges approved for incurrence	171.0		171.0		171.0	171.0
Cash charges approved for incurrence	44.2		44.2		44.2	44.2
Non-cash charges approved for incurrence	$ 126.8		$ 126.8		$ 126.8	$ 126.8