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Change in additional paid in capital as a result of a reallocation of a subsidiary's stockholders' equity to noncontrolling interest due to the subsidiary issuing stock. This reallocation is from a capital transaction.

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Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net of tax and reclassification adjustments amount of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Also includes the following: gain (loss) on foreign currency forward exchange contracts; foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; and gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) that has been designated and qualified as a hedging instrument for hedging of the foreign currency exposure of a net investment in a foreign operation.

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Net of tax and reclassifications amount of pension and other postretirement benefit plans (gain) loss included in accumulated other comprehensive income (loss).

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Equity impact of the value of treasury stock (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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The increase (decrease), resulting in a gain, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.

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STOCKHOLDERS' EQUITY (Reconciliation of Stockholders Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended				9 Months Ended
	Feb. 24, 2013	Feb. 26, 2012	Feb. 24, 2013	Feb. 26, 2012	Feb. 24, 2013 Common Stock [Member]	May 27, 2012 Common Stock [Member]	Feb. 24, 2013 Additional Paid-in Capital [Member]	Feb. 24, 2013 Retained Earnings [Member]	Feb. 24, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Feb. 24, 2013 Treasury Stock [Member]	Feb. 24, 2013 Noncontrolling Interests [Member]
Schedule Of Stockholders Equity [Line Items]
Opening Balance			$ 4,536.0		$ 2,839.7	$ 2,839.7	$ 901.5	$ 4,765.1	$ (299.1)	$ (3,767.7)	$ 96.5
Opening Balance, Shares					567.9	567.9
Stock option and incentive plans			244.4				35.2	(2.1)		211.3
Currency translation adjustment			14.0						12.2		1.8
Issuance of treasury shares			269.3				50.2			219.1
Repurchase of common shares			(245.0)							(245.0)
Unrealized gain on securities			0.1
Derivative adjustment, net of reclassification adjustment	32.4	11.5	29.4	(68.7)					29.4
Activities of noncontrolling interests			1.1				(1.2)				2.3
Pension and postretirement healthcare benefits	(5.7)	(0.6)	(4.6)	18.4					(4.6)
Dividends declared on common stock; $0.74 per share			(302.6)					(302.6)
Net income attributable to ConAgra Foods, Inc.	120.0	280.1	581.7	554.1				581.7
Ending Balance	$ 5,123.8		$ 5,123.8		$ 2,839.7	$ 2,839.7	$ 985.7	$ 5,042.1	$ (262.0)	$ (3,582.3)	$ 100.6
Ending Balance, Shares					567.9	567.9