| Consolidated Statements of Earnings [Abstract] | |
| Net sales | 3.85B |
| Costs and expenses: | |
| Cost of goods sold | 2.98B |
| Selling, general and administrative expenses | 614M |
| Interest expense, net | 70.6M |
| Income from continuing operations before income taxes and equity method investment earnings | 189.4M |
| Income tax expense | 78M |
| Equity method investment earnings | 12M |
| Income from continuing operations | 123.4M |
| Income (loss) from discontinued operations, net of tax | 0 |
| Net income | 123.4M |
| Less: Net income (loss) attributable to noncontrolling interests | 3.4M |
| Net income attributable to ConAgra Foods, Inc. | 120M |
| Earnings per share - basic | |
| Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders | |
| Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders | |
| Net income attributable to ConAgra Foods, Inc. common stockholders | 0.29 |
| Earnings per share - diluted | |
| Income from continuing operations attributable to ConAgra Foods, Inc. common stockholders | |
| Income (loss) from discontinued operations attributable to ConAgra Foods, Inc. common stockholders | |
| Net income attributable to ConAgra Foods, Inc. common stockholders | 0.29 |