DISCONTINUED OPERATIONS (Assets and Liabilities Classified as Held for Sale) (Additional Information) (Details) $ in Millions	May. 25, 2014 USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Allowance for doubtful accounts	$ 1.2

Disposal Group, Including Discontinued Operation, Allowance for Doubtful Accounts Receivable

No definition available.

Name:	cag_DisposalGroupIncludingDiscontinuedOperationAllowanceforDoubtfulAccountsReceivable
Namespace Prefix:	cag_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant