BUSINESS SEGMENTS AND RELATED INFORMATION - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Nov. 24, 2024	Aug. 25, 2024	Nov. 26, 2023	Aug. 27, 2023	Nov. 24, 2024	Nov. 26, 2023
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	$ 3,195.1		$ 3,208.1		$ 5,990.0	$ 6,112.1
Operating profit	472.5		543.3		966.3	1,069.0
Equity method investment earnings	48.5		54.3		77.6	89.8
General corporate expenses	69.9		94.8		162.1	131.5
Pension and postretirement non-service expense (income)	3.1		(0.4)		6.2	(0.7)
Interest expense, net	108.2		113.3		214.0	219.3
Income tax expense (benefit)	61.5		102.9		(77.4)	201.2
Net income	284.5		286.2		751.4	606.1
Less: Net income attributable to noncontrolling interests					0.1	0.2
Net income attributable to Conagra Brands, Inc. common stockholders:	284.5	$ 466.8	286.2	$ 319.7	751.3	605.9
Grocery & Snacks
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	1,321.0		1,295.1		2,503.7	2,498.0
Operating profit	293.2		279.2		542.3	537.9
Refrigerated & Frozen
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	1,338.5		1,338.5		2,424.9	2,490.1
Operating profit	102.6		220.2		278.6	419.4
International
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	243.4		279.6		502.5	539.8
Operating profit	40.9		5.9		74.5	29.6
Food service
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	292.2		294.9		558.9	584.2
Operating profit	35.8		38.0		70.9	82.1
Frozen
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	1,140.2		1,106.1		2,053.6	2,054.5
Other Shelf-stable
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	751.0		728.0		1,441.3	1,424.8
Refrigerated
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	198.3		232.4		371.3	435.6
Snacks
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	570.0		567.1		1,062.4	1,073.2
International
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	243.4		279.6		502.5	539.8
Food service
BUSINESS SEGMENTS AND RELATED INFORMATION
Net sales	$ 292.2		$ 294.9		$ 558.9	$ 584.2