SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Feb. 22, 2015
Accounting Policies [Abstract]
Basis of Consolidation	Basis of Consolidation — The condensed consolidated financial statements include the accounts of ConAgra Foods, Inc. and all majority-owned subsidiaries. In addition, the accounts of all variable interest entities for which we have been determined to be the primary beneficiary are included in our condensed consolidated financial statements from the date such determination is made. All significant intercompany investments, accounts, and transactions have been eliminated.
Comprehensive Income	Comprehensive Income — Comprehensive income includes net income, currency translation adjustments, certain derivative-related activity, changes in the value of available-for-sale investments, and changes in prior service cost and net actuarial gains (losses) from pension (for amounts not in excess of the 10% corridor) and post-retirement health care plans. We generally deem our foreign investments to be essentially permanent in nature and we do not provide for taxes on currency translation adjustments arising from converting the investment denominated in a foreign currency to U.S. dollars. When we determine that a foreign investment, as well as undistributed earnings, are no longer permanent in nature, estimated taxes are provided for the related deferred tax liability (asset), if any, resulting from currency translation adjustments.
Reclassifications and other changes	Reclassifications and other changes — Certain prior year amounts have been reclassified to conform with current year presentation.
Use of Estimates	Use of Estimates — Preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions. These estimates and assumptions affect reported amounts of assets, liabilities, revenues, and expenses as reflected in the condensed consolidated financial statements. Actual results could differ from these estimates.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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