Note 3 - Real Estate - Estimated Net Amortization Income (Expense) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Above-market and below-market leases amortization, net, 2023	$ 11.0
Above-market and below-market leases amortization, net, 2024	12.8
Above-market and below-market leases amortization, net, 2025	13.2
Above-market and below-market leases amortization, net, 2026	14.0
Above-market and below-market leases amortization, net, 2027	13.5
In-place Leases [Member]
In-place leases amortization, 2023	(83.5)
In-place leases amortization, 2024	(56.5)
In-place leases amortization, 2025	(39.6)
In-place leases amortization, 2026	(28.1)
In-place leases amortization, 2027	$ (21.0)

Amortization expense of above and below market leases for the next twelve months.

No definition available.

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

- Definition

Amortization expense of above and below market leases for the second year.

+ References

No definition available.

+ Details

Name:	kim_AboveAndBelowMarketLeaseAmortizationIncomeExpenseNetYear2
Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortization expense of above and below market leases for the third year.

+ References

No definition available.

+ Details

Name:	kim_AboveAndBelowMarketLeaseAmortizationIncomeExpenseNetYear3
Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortization expense of above and below market leases for the fourth year.

+ References

No definition available.

+ Details

Name:	kim_AboveAndBelowMarketLeaseAmortizationIncomeExpenseNetYear4
Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortization expense of above and below market leases for the fifth year.

+ References

No definition available.

+ Details

Name:	kim_AboveAndBelowMarketLeaseAmortizationIncomeExpenseNetYear5
Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=kim_InplaceLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: