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v3.23.2

Note 14 - Leases (Details Textual) - Warehouse Facility [Member] $ in Millions | 12 Months Ended
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May 28, 2023 USD ($)
Lessee, Lease Payment Not Yet Commenced | $ 268.5
Future Minimum Lease Commitment. | $ 254.3
Lessee, Term of Contract (Year) | 20 years

X
- Definition Represents future minimum lease commitment. + References No definition available. + Details
Name: | cag_FutureMinimumLeaseCommitment
Namespace Prefix: | cag_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, lease payment not yet commenced. + References No definition available. + Details
Name: | cag_LesseeLeasePaymentNotYetCommenced
Namespace Prefix: | cag_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | cag_LesseeTermOfContract
Namespace Prefix: | cag_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=cag_WarehouseFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |