XML 119 R103.htm IDEA: XBRL DOCUMENT
v3.24.2

PENSION AND POSTRETIREMENT BENEFITS - Schedule of Pension Plan Weighted-Average Asset Allocations and Target Asset Allocations (Details) - USD ($) $ in Millions | May 26, 2024 | May 28, 2023
--- | --- | ---
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 100.00% | 100.00%
Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets |  | $ 158.3
Defined Benefit Plan, Equity Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 5.00% | 4.00%
Defined Benefit Plan, Equity Securities, US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets |  | $ 78.5
Defined Benefit Plan, Debt Security [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 86.00% | 84.00%
Defined Benefit Plan, Real Estate [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 1.00% | 1.00%
Private Equity Funds [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 4.00% | 4.00%
Other Plan Asset Category [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Weighted-average Asset Allocations | 4.00% | 7.00%
Pension Plan Assets [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | $ 2,738.9 | $ 2,948.5
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 2.2 | 5.7
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 71.0 |
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 34.8 | 59.0
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets |  | 34.4
Fair Value, Inputs, Level 1 [Member] | Receivable For Unsettled Transactions [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 20.6 | 2.6
Fair Value, Inputs, Level 1 [Member] | Pension Plan Assets [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 87.4 | 101.7
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 75.3 | 152.6
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 24.0 |
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets |  | 19.5
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 508.1 | 562.2
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 1,797.6 | 1,878.1
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 53.3 | 22.0
Fair Value, Inputs, Level 2 [Member] | Pension Plan Assets [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 2,458.3 | 2,634.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 77.5 |
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 95.0 |
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 34.8 |
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets |  | 34.4
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | US Treasury and Government [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 508.1 | 562.2
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Corporate Debt Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 1,797.6 | 1,878.1
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 53.3 | 22.0
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Receivable For Unsettled Transactions [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 20.6 | 2.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Pension Plan Assets [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | 2,545.7 | 2,736.1
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan Assets [Member] |  |
PENSION AND POSTRETIREMENT BENEFITS |  |
Total pension plan assets | $ 193.2 | $ 212.4

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment within defined benefit plan asset category. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanDebtSecurityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cag_OtherPlanAssetCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cag_PensionPlanAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=cag_ReceivableForUnsettledTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |