Note 12 - Other Assets (Details Textual) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Number of Loans	3
Property Held-for-sale, Net Carrying Amount	$ 56.3
Gain (Loss) on Repayment of Mortgage Loan	4.0
Capitalized Computer Software, Net, Ending Balance	18.4	$ 18.4
Capitalized Computer Software, Amortization	$ 3.5	3.1	$ 3.2
Performing Financial Instruments [Member]
Number of Loans	11
Weingarten Realty Investors [Member]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Mortgage Loans Receivable		$ 13.4

The amount of mortgage loans receivable recognized as of the acquisition date.

No definition available.

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Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of gain (loss) on repayment of mortgage loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the carrying amount, net of accumulated depreciation and amortization, of property classified as held-for-sale.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of expense for amortization of capitalized computer software costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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Data Type:	xbrli:monetaryItemType
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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Period Type: