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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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The increase (decrease) in accumulated comprehensive income during the period related to pension and other postretirement benefit plans, after tax. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

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Appreciation or loss in value (before reclassification adjustment) of the total of unsold securities during the period being reported on, net of tax. Reclassification adjustments include: (1) the unrealized holding gain (loss), net of tax, at the date of the transfer for a debt security from the held-to-maturity category transferred into the available-for-sale category. Also includes the unrealized gain (loss) at the date of transfer for a debt security from the available-for-sale category transferred into the held-to-maturity category; (2) the unrealized gains (losses) realized upon the sale of securities, after tax; and (3) the unrealized gains (losses) realized upon the write-down of securities, after tax.

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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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Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.

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Stockholders' Equity (Details) (USD $) In Millions	3 Months Ended				3 Months Ended
Stockholders' Equity (Details) (USD $) In Millions	Aug. 28, 2011	Aug. 29, 2010	Aug. 28, 2011 Common Stock [Member]	May 29, 2011 Common Stock [Member]	Aug. 28, 2011 Additional Paid-in Capital [Member]	Aug. 28, 2011 Retained Earnings [Member]	Aug. 28, 2011 Accumulated Other Comprehensive Income (Loss) [Member]	Aug. 28, 2011 Treasury Stock [Member]	Aug. 28, 2011 Noncontrolling Interest [Member]
Summary of Stockholders' Equity
Opening Balance	$ 4,708.5		$ 2,839.7	$ 2,839.7	$ 899.1	$ 4,853.6	$ (222.7)	$ (3,668.2)	$ 7.0
Opening balance, shares			567.9	567.9
Stock option and incentive plans	68.1				(18.3)	(1.3)		87.7
Currency translation adjustment	(9.9)						(9.9)
Unrealized loss on securities	(0.1)	(0.2)					(0.1)
Derivative adjustment, net of reclassification adjustment	(31.9)	0.1					(31.9)
Activities of noncontrolling interests	(0.5)				(0.4)				(0.1)
Pension and postretirement healthcare benefits	6.1	2.3					6.1
Dividends declared on common stock; $0.23 per share	(95.3)					(95.3)
Net income available to ConAgra Foods, Inc	85.3	146.4				85.3
Ending Balance	$ 4,730.3		$ 2,839.7	$ 2,839.7	$ 880.4	$ 4,842.3	$ (258.5)	$ (3,580.5)	$ 6.9
Ending Balance, shares			567.9	567.9