Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 23, 2014	Feb. 24, 2013	Feb. 23, 2014	Feb. 24, 2013
Statement of Partners' Capital [Abstract]
Net income	$ 236.9	$ 123.4	$ 636.5	$ 592.1
Derivative adjustments, net of tax:
Unrealized derivative adjustments	(8.1)	32.3	31.2	29.2
Reclassification for derivative adjustments included in net income	34.4	0.1	34.5	0.2
Other comprehensive income (loss):
Unrealized gains (losses) on available-for-sale securities, net of tax	(0.2)	0.1	0.2	0.1
Unrealized currency translation gains (losses)	(29.5)	(4.6)	(50.5)	14.0
Pension and postretirement healthcare liabilities, net of tax:
Unrealized pension and postretirement healthcare liabilities	0	(5.8)	0.2	(5.6)
Reclassification for pension and postretirement healthcare liabilities included in net income	0.6	0.1	1.6	1.0
Comprehensive income	234.1	145.6	653.7	631.0
Less: Comprehensive income (loss) attributable to noncontrolling interests	3.2	5.3	(0.1)	12.2
Comprehensive income attributable to ConAgra Foods, Inc.	$ 230.9	$ 140.3	$ 653.8	$ 618.8