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Note 10 - Noncontrolling Interests (Details Textual) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2021 USD ($) | Mar. 31, 2021 USD ($)
Asset Purchase, Total Consideration |  | $ 104
KIM RDC, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Number of Operating Property Acquired | 2 |
Asset Purchase, Total Consideration | $ 104 |
KIM RDC, LLC [Member] | Joint Venture with KP Lancewood [Member] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00% |

X
- Definition The amount of total consideration for purchase of assets. + References No definition available. + Details
Name: | kim_AssetPurchaseTotalConsideration
Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents number of operating property acquired. + References No definition available. + Details
Name: | kim_NumberOfOperatingPropertyAcquired
Namespace Prefix: | kim_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=kim_KIMRDCLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=kim_JointVentureWithKpLancewoodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |