Summary of Significant Accounting Policies (Tables)

12 Months Ended

May 27, 2012

Summary of Significant Accounting Policies [Abstract]

Property plant and equipment estimated useful lives of respective classes of assets

Land improvements	1 - 40 years
Buildings	15 - 40 years
Machinery and equipment	3 - 20 years
Furniture, fixtures, office equipment and other	5 - 15 years

Impacts Adjustments Made to Financial Statements

Consolidated Statement of Operations

	Fiscal Year Ended May 29, 2011							Fiscal Year Ended May 30, 2010
	Previously Reported		Revised		Effect of Change			Previously Reported		Revised		Effect of Change
Selling, general and administrative expenses	$	1,511.1	$	1,509.9	$	(1.2	)	$	1,819.4	$	1,987.7	$	168.3
Cost of goods sold		9,389.6		9,389.6		—			8,953.7		8,966.3		12.6
Income tax expense		421.0		421.6		0.6			360.9		292.3		(68.6	)
Income from continuing operations		830.3		830.9		0.6			742.6		630.3		(112.3	)
Net income		818.8		819.4		0.6			723.3		611.0		(112.3	)
Net income attributable to ConAgra Foods, Inc.		817.0		817.6		0.6			725.8		613.5		(112.3	)
Earnings per share from continuing operations-basic	$	1.92	$	1.92	$	—		$	1.68	$	1.43	$	(0.25	)
Earnings per share attributable to ConAgra Foods-basic	$	1.90	$	1.90	$	—		$	1.63	$	1.38	$	(0.25	)
Earnings per share from continuing operations-diluted	$	1.90	$	1.90	$	—		$	1.66	$	1.41	$	(0.25	)
Earnings per share attributable to ConAgra Foods-diluted	$	1.88	$	1.88	$	—		$	1.62	$	1.37	$	(0.25	)

Consolidated Balance Sheet

	May 29, 2011
	Previously Reported*			Revised			Effect of Change
Retained earnings	$	4,821.8		$	4,690.3		$	(131.5	)
Accumulated other comprehensive loss		(222.7	)		(91.2	)		131.5

Consolidated Statement of Cash Flows

	Fiscal Year Ended May 29, 2011							Fiscal Year Ended May 30, 2010
	Previously Reported		Revised		Effect of Change			Previously Reported		Revised			Effect of Change
Cash flows from operating activities:
Net income	$	818.8	$	819.4	$	0.6		$	723.3	$	611.0		$	(112.3	)
Income from continuing operations		830.3		830.9		0.6			742.6		630.3			(112.3	)
Pension expense		—		54.0		54.0			—		227.4			227.4
Other items		267.5		212.9		(54.6	)		89.7		(25.4	)		(115.1	)
Net cash flows from operating activities		1,352.3		1,352.3		—			1,472.7		1,472.7			—

	Fiscal Year Ended May 29, 2011									Fiscal Year Ended May 30, 2010
	Previously Reported*			Revised			Effect of Change			Previously Reported*			Revised			Effect of Change
Retained earnings:
Beginning balance	$	4,385.3		$	4,253.2		$	(132.1	)	$	4,010.7		$	3,990.9		$	(19.8	)
Net income		817.0			817.6			0.6			725.8			613.5			(112.3	)
Ending balance		4,821.8			4,690.3			(131.5	)		4,385.3			4,253.2			(132.1	)
Accumulated other comprehensive loss:
Beginning balance		(285.3	)		(153.2	)		132.1			(103.7	)		(83.9	)		19.8
Pensions and postretirement healthcare benefits		24.2			23.6			(0.6	)		(178.1	)		(65.8	)		112.3
Ending balance		(222.7	)		(91.2	)		131.5			(285.3	)		(153.2	)		132.1
Total equity		4,676.7			4,676.7			—			4,897.1			4,897.1			—

Consolidated Statement of Comprehensive Income

	Fiscal Year Ended May 29, 2011							Fiscal Year Ended May 30, 2010
	Previously Reported		Revised		Effect of Change			Previously Reported			Revised			Effect of Change
Net income	$	818.8	$	819.4	$	0.6		$	723.3		$	611.0		$	(112.3	)
Pension and postretirement healthcare liabilities, net of tax		24.2		23.6		(0.6	)		(178.1	)		(65.8	)		112.3

* Retained earnings also reflects the impact of the change related to income taxes as discussed in Note 16.

Balances in accumulated other comprehensive income (loss), net of tax

	Currency Translation Adjustment, Net of Reclassification Adjustments			Net Derivative Adjustment, Net of  Reclassification Adjustments			Unrealized Loss on Available- For-Sale Securities, Net of Reclassification Adjustments			Pension and Postretirement Adjustments			Accumulated Other Comprehensive Income (Loss)
Balance at May 31, 2009	$	52.6		$	(1.2	)	$	(1.2	)	$	(134.1	)	$	(83.9	)
Current-period change		(3.7	)		0.2			—			(65.8	)		(69.3	)
Balance at May 30, 2010		48.9			(1.0	)		(1.2	)		(199.9	)		(153.2	)
Current-period change		45.7			(7.2	)		(0.1	)		23.6			62.0
Balance at May 29, 2011		94.6			(8.2	)		(1.3	)		(176.3	)		(91.2	)
Current-period change		(52.0	)		(89.1	)		(0.1	)		(66.7	)		(207.9	)
Balance at May 27, 2012	$	42.6		$	(97.3	)	$	(1.4	)	$	(243.0	)	$	(299.1	)

Income tax expense benefit on components of other comprehensive income loss

	2012			2011			2010
Net derivative adjustment	$	(52.7	)	$	(4.2	)	$	0.1
Unrealized losses on available-for-sale securities		(0.1	)		(0.1	)		—
Pension and postretirement healthcare liabilities		(35.4	)		15.8			(40.0	)