RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		34 Months Ended	36 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 28, 2021
Pinnacle Integration Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	$ 346.5		$ 346.5		$ 346.5	$ 346.5
Cash charges incurred or expected to be incurred	278.0		278.0		278.0	278.0
Non-cash charges incurred or expected to be incurred	68.5		68.5		68.5	68.5
Recognized charges	5.8	$ 10.2	13.1	$ 18.8		286.8
Charges that have resulted or will result in cash outflows	4.6		11.9			252.8
Non-cash charges	1.2		1.2			34.0
Conagra Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Charges expected to be incurred	143.4		143.4		143.4	143.4
Cash charges incurred or expected to be incurred	40.2		40.2		40.2	40.2
Non-cash charges incurred or expected to be incurred	103.2		103.2		103.2	103.2
Recognized charges	6.6	$ 10.5	15.1	$ 27.8	127.9
Charges that have resulted or will result in cash outflows					28.7
Non-cash charges					99.2
Charges approved for incurrence	172.6		172.6		172.6	172.6
Cash charges approved for incurrence	45.8		45.8		45.8	45.8
Non-cash charges approved for incurrence	126.8		$ 126.8		$ 126.8	$ 126.8
Charges that have resulted or will result in cash outflows	2.2
Non-cash charges	$ 4.4