Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 23, 2014	Feb. 24, 2013
Cash flows from operating activities:
Net income	$ 636.5	$ 592.1
Income (loss) from discontinued operations	7.2	(0.9)
Income from continuing operations	629.3	593.0
Adjustments to reconcile income from continuing operations to net cash flows from operating activities:
Depreciation and amortization	447.4	298.1
Asset impairment charges	34.5	19.8
Earnings of affiliates in excess of distributions	(2.9)	(11.8)
Share-based payments expense	45.9	52.8
Contributions to pension plans	(13.7)	(14.7)
Pension expense	(6.7)	16.5
Terminated forward starting swap payable	54.9	0
Other Operating Activities, Cash Flow Statement	1.4	(37.7)
Change in operating assets and liabilities excluding effects of business acquisitions and dispositions:
Accounts receivable	14.2	(12.8)
Inventory	(157.8)	(234.8)
Deferred income taxes and income taxes payable, net	47.1	68.1
Prepaid expenses and other current assets	(22.4)	(32.7)
Accounts payable	(10.3)	43.8
Accrued payroll	(119.5)	88.0
Other accrued liabilities	(4.0)	(54.8)
Net cash flows from operating activities — continuing operations	937.4	780.8
Net cash flows from operating activities — discontinued operations	4.9	0.9
Net cash flows from operating activities	942.3	781.7
Cash flows from investing activities:
Additions to property, plant and equipment	(471.0)	(286.0)
Sale of property, plant and equipment	15.0	7.6
Purchase of businesses, net of cash acquired	(40.9)	(5,017.7)
Investment in equity method investee	0	(1.8)
Net cash flows from investing activities — continuing operations	(496.9)	(5,297.9)
Net cash flows from investing activities — discontinued operations	53.1	(3.1)
Net cash flows from investing activities	(443.8)	(5,301.0)
Cash flows from financing activities:
Net short-term borrowings	(39.3)	(38.9)
Issuance of long-term debt	0	6,217.7
Debt issuance costs	0	(56.6)
Repayment of long-term debt	(71.2)	(911.8)
Issuance of ConAgra Foods, Inc. common shares	0	269.3
Repurchase of ConAgra Foods, Inc. common shares	(100.0)	(245.0)
Cash dividends paid	(315.5)	(296.6)
Exercise of stock options and issuance of other stock awards	87.4	197.2
Other items	0	2.2
Net cash flows from financing activities	(438.6)	5,137.5
Effect of exchange rate changes on cash and cash equivalents	(4.6)	2.6
Net change in cash and cash equivalents	55.3	620.8
Cash and cash equivalents at beginning of period	183.9	103.0
Cash and cash equivalents at end of period	$ 239.2	$ 723.8