Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
Cash flows from operating activities:
Net income	$ 786.1	$ 474.4	$ 819.4
Income (loss) from discontinued operations	0	0.1	(11.5)
Income from continuing operations	786.1	474.3	830.9
Adjustments to reconcile income from continuing operations to net cash flows from operating activities:
Depreciation and amortization	445.2	371.8	360.9
Asset impairment charges	20.2	8.6	19.8
Insurance recoveries recognized related to Garner accident	0	0	(109.4)
Receipts from insurance carriers related to Garner accident	0	0	64.5
Gain on acquisition of controlling interest in Agro Tech Foods Ltd.	0	(58.7)	0
Earnings of affiliates in excess of distributions	(11.1)	(17.6)	(13.1)
Proceeds from settlement of interest rate swaps	0	0	31.5
Share-based payments expense	67.4	41.8	44.8
Receipt of interest on payment-in-kind notes earned in prior years	0	0	102.8
Gain on collection of payment-in-kind notes	0	0	(25.0)
Contributions to pension plans	(19.8)	(326.4)	(129.4)
Pension expense	23.5	421.8	54.0
Other items	2.5	5.3	(36.3)
Change in operating assets and liabilities excluding effects of business acquisitions and dispositions:
Accounts receivable	(73.1)	(4.3)	2.8
Inventory	21.1	14.9	(190.7)
Deferred income taxes and income taxes payable, net	124.7	(6.8)	263.8
Prepaid expenses and other current assets	(22.0)	5.5	7.9
Accounts payable	6.9	82.1	185.0
Accrued payroll	109.9	48.4	(139.2)
Other accrued liabilities	(69.3)	(11.0)	14.4
Net cash flows from operating activities — continuing operations	1,412.2	1,049.7	1,340.0
Net cash flows from operating activities — discontinued operations	0	2.3	12.3
Net cash flows from operating activities	1,412.2	1,052.0	1,352.3
Cash flows from investing activities:
Additions to property, plant and equipment	(458.7)	(336.7)	(466.2)
Sale of property, plant and equipment	18.0	9.7	18.9
Receipts from insurance carriers related to Garner accident	0	0	18.0
Purchase of businesses, net of cash acquired	(5,018.8)	(635.2)	(131.1)
Purchase of intangible assets	(4.8)	(62.5)	(18.0)
Purchase of secured loan	0	(39.6)	0
Proceeds from collection of payment-in-kind notes	0	0	412.5
Investment in equity method investee	(1.5)	0	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(5,465.8)	(1,064.3)	(165.9)
Net cash flows from investing activities - discontinued operations	0	0	254.8
Net Cash Provided by (Used in) Investing Activities	(5,465.8)	(1,064.3)	88.9
Cash flows from financing activities:
Net short-term borrowings	145.0	40.0	0
Issuance of long-term debt	6,217.7	0	0
Debt issuance costs	(56.6)	0	0
Repayment of long-term debt	(2,074.0)	(363.6)	(294.3)
Issuance of ConAgra Foods, Inc. common shares	269.2	0	0
Repurchase of ConAgra Foods, Inc. common shares	(245.0)	(352.4)	(825.0)
Cash dividends paid	(400.7)	(388.6)	(374.5)
Exercise of stock options and issuance of other stock awards	274.4	213.2	59.7
Other items	3.0	1.8	2.1
Net cash flows from financing activities - continuing operations	4,133.0	(849.6)	(1,432.0)
Net cash flows from financing activities - discontinued operations	0	0	(0.1)
Net cash flows from financing activities	4,133.0	(849.6)	(1,432.1)
Effect of exchange rate changes on cash and cash equivalents	1.5	(7.5)	10.1
Net change in cash and cash equivalents	80.9	(869.4)	19.2
Cash and cash equivalents at beginning of period	103.0	972.4	953.2
Cash and cash equivalents at end of period	$ 183.9	$ 103.0	$ 972.4