BUSINESS SEGMENTS AND RELATED INFORMATION - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2024	Aug. 27, 2023
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	$ 2,794.9	$ 2,904.0
Operating profit	493.8	525.7
Equity method investment earnings	29.1	35.5
General corporate expenses	92.2	36.7
Pension and postretirement non-service expense (income)	3.1	(0.3)
Interest expense, net	105.8	106.0
Income tax expense (benefit)	(138.9)	98.3
Net income	466.9	319.9
Less: Net income attributable to noncontrolling interests	0.1	0.2
Net income attributable to Conagra Brands, Inc. common stockholders:	466.8	319.7
Grocery & Snacks
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	1,182.7	1,202.9
Operating profit	249.1	258.7
Refrigerated & Frozen
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	1,086.4	1,151.6
Operating profit	176.0	199.2
International
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	259.1	260.2
Operating profit	33.6	23.7
Food service
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	266.7	289.3
Operating profit	35.1	44.1
Frozen
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	913.4	948.4
Other Shelf-stable
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	690.3	696.8
Refrigerated
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	173.0	203.2
Snacks
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	492.4	506.1
International
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	259.1	260.2
Food service
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	$ 266.7	$ 289.3