XML 138 R123.htm IDEA: XBRL DOCUMENT
v3.19.2

PENSION AND POSTRETIREMENT BENEFITS - Schedule of Contributions for Plans That Are Not Individually Significant (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 26, 2019 | May 27, 2018 | May 28, 2017
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 6.0 | $ 6.5 | $ 8.0
Bakery and Confectionary Union and Industry International Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | 0.1 | 1.5 | 1.8
Central States, Southeast and Southwest Areas Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | 1.8 | 1.8 | 1.8
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | 3.2 | 2.8 | 4.0
Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Total Contributions | $ 0.9 | $ 0.4 | $ 0.4

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_MultiemployerPlansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contributions made to multiemployer plan by all employers who participate in plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 7 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450678-114947 + Details
Name: | us-gaap_MultiemployerPlansPlanContributions1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_MultiemployerPlanNameAxis=cag_BakeryAndConfectionaryUnionAndIndustryInternationalPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MultiemployerPlanNameAxis=cag_CentralStatesSoutheastAndSouthwestAreasPensionFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MultiemployerPlanNameAxis=cag_WesternConferenceOfTeamstersPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MultiemployerPlanNameAxis=cag_OtherPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |