BUSINESS SEGMENTS AND RELATED INFORMATION (Segment Operations) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 24, 2014	Aug. 25, 2013
Net sales
Net sales	$ 3,701.0	$ 3,715.8
Operating profit
Total operating profit	353.0	367.6
Equity method investment earnings
Total equity method investment earnings	25.6	4.1
Operating profit plus equity method investment earnings
Total operating profit plus equity method investment earnings	378.6	371.7
Interest expense, net	83.7	95.8
Income tax expense	42.5	28.9
Income from continuing operations	111.2	133.4
Less: Net income attributable to noncontrolling interests	2.2	2.9
Income from continuing operations attributable to ConAgra Foods, Inc.	109.0	130.5
Consumer Foods
Net sales
Net sales	1,632.3	1,649.4
Operating profit
Total operating profit	190.0	165.0
Equity method investment earnings
Total equity method investment earnings	0.3	0.4
Operating profit plus equity method investment earnings
Total operating profit plus equity method investment earnings	190.3	165.4
Commercial Foods
Net sales
Net sales	1,088.3	1,068.9
Operating profit
Total operating profit	121.1	137.1
Equity method investment earnings
Total equity method investment earnings	25.3	3.7
Operating profit plus equity method investment earnings
Total operating profit plus equity method investment earnings	146.4	140.8
Private Brands
Net sales
Net sales	980.4	997.5
Operating profit
Total operating profit	41.9	65.5
Operating profit plus equity method investment earnings
Total operating profit plus equity method investment earnings	41.9	65.5
General corporate expense
Operating profit plus equity method investment earnings
General corporate expense	$ 141.2	$ 113.6