Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flow from operating activities:
Net income	$ 293,776	$ 235,959
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	126,301	130,294
Impairment charges	11,806	272
Straight-line rental income adjustments, net	(7,701)	(7,935)
Amortization of above-market and below-market leases, net	(2,989)	(4,297)
Amortization of deferred financing costs and fair value debt adjustments, net	(2,313)	(7,021)
Early extinguishment of debt charges	0	7,173
Equity award expense	9,333	7,513
Gain on sale of properties	(39,206)	(4,193)
Loss/(gain) on marketable securities, net	10,144	(121,764)
Distributions from joint ventures and other investments	13,428	25,925
Change in accounts and notes receivable, net	8,887	8,925
Change in other operating assets and liabilities, net	(30,597)	(14,897)
Change in other operating assets and liabilities, net	(19,310)	(32,460)
Net cash flow provided by operating activities	345,233	194,551
Cash flow from investing activities:
Acquisition of operating real estate and other related net assets	(98,546)	(18,671)
Improvements to operating real estate	(40,202)	(29,435)
Investment in marketable securities	(2,202)	(1,469)
Proceeds from sale of marketable securities	138,207	100
Investment in cost method investment	0	(3,000)
Investments in and advances to real estate joint ventures	(12,848)	(13,116)
Reimbursements of investments in and advances to real estate joint ventures	5,446	8,569
Investments in and advances to other investments	(6,326)	(8,445)
Reimbursements of investments in and advances to other investments	199	24,398
Investment in mortgage and other financing receivables	(11,211)	(3,000)
Collection of mortgage and other financing receivables	59	43
Proceeds from sale of properties	70,983	8,410
Net cash flow provided by/(used for) investing activities	43,559	(35,616)
Cash flow from financing activities:
Principal payments on debt, excluding normal amortization of rental property debt	(37,187)	(85,683)
Principal payments on rental property debt	(2,794)	(2,600)
Proceeds from mortgage loan financings	0	19,000
Financing origination costs	(6,026)	(10,165)
Payment of early extinguishment of debt charges	0	(6,470)
Contributions from noncontrolling interests	0	891
Redemption/distribution of noncontrolling interests	(2,609)	(4,673)
Dividends paid	(148,882)	(123,758)
Proceeds from issuance of stock, net	3,727	2,568
Repurchase of preferred stock	(268)	0
Shares repurchased for employee tax withholding on equity awards	(16,085)	(13,428)
Change in tenants' security deposits	680	1,038
Net cash flow used for financing activities	(209,444)	(123,280)
Net change in cash, cash equivalents and restricted cash	179,348	35,655
Cash, cash equivalents and restricted cash, beginning of the period	149,829	334,663
Cash, cash equivalents and restricted cash, end of the period	329,177	370,318
Interest paid during the period, including payment of early extinguishment of debt charges of $0 and $6,470, respectively (net of capitalized interest of $198 and $102, respectively)	54,847	60,213
Senior Unsecured Notes [Member]
Cash flow from financing activities:
Proceeds from unsecured debt	0	600,000
Repayments of unsecured notes	0	(500,000)
Joint Ventures [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	(24,204)	(23,570)
Other Real Estate Investments [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	(2,122)	(5,373)
Kimco Realty OP, LLC [Member]
Cash flow from operating activities:
Net income	293,776	235,959
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	126,301	130,294
Impairment charges	11,806	272
Straight-line rental income adjustments, net	(7,701)	(7,935)
Amortization of above-market and below-market leases, net	(2,989)	(4,297)
Amortization of deferred financing costs and fair value debt adjustments, net	(2,313)	(7,021)
Early extinguishment of debt charges	0	7,173
Equity award expense	9,333	7,513
Gain on sale of properties	(39,206)	(4,193)
Loss/(gain) on marketable securities, net	10,144	(121,764)
Distributions from joint ventures and other investments	13,428	25,925
Change in accounts and notes receivable, net	8,887	8,925
Change in other operating assets and liabilities, net	(30,597)	(14,897)
Change in other operating assets and liabilities, net	(19,310)	(32,460)
Net cash flow provided by operating activities	345,233	194,551
Cash flow from investing activities:
Acquisition of operating real estate and other related net assets	(98,546)	(18,671)
Improvements to operating real estate	(40,202)	(29,435)
Investment in marketable securities	(2,202)	(1,469)
Proceeds from sale of marketable securities	138,207	100
Investment in cost method investment	0	(3,000)
Investments in and advances to real estate joint ventures	(12,848)	(13,116)
Reimbursements of investments in and advances to real estate joint ventures	5,446	8,569
Investments in and advances to other investments	(6,326)	(8,445)
Reimbursements of investments in and advances to other investments	199	24,398
Investment in mortgage and other financing receivables	(11,211)	(3,000)
Collection of mortgage and other financing receivables	59	43
Proceeds from sale of properties	70,983	8,410
Net cash flow provided by/(used for) investing activities	43,559	(35,616)
Cash flow from financing activities:
Principal payments on debt, excluding normal amortization of rental property debt	(37,187)	(85,683)
Principal payments on rental property debt	(2,794)	(2,600)
Proceeds from mortgage loan financings	0	19,000
Financing origination costs	(6,026)	(10,165)
Payment of early extinguishment of debt charges	0	(6,470)
Contributions from noncontrolling interests	0	891
Redemption/distribution of noncontrolling interests	(2,609)	(4,673)
Proceeds from issuance of stock, net	3,727	2,568
Repurchase of preferred stock	(268)	0
Shares repurchased for employee tax withholding on equity awards	(16,085)	(13,428)
Change in tenants' security deposits	680	1,038
Net cash flow used for financing activities	(209,444)	(123,280)
Net change in cash, cash equivalents and restricted cash	179,348	35,655
Cash, cash equivalents and restricted cash, beginning of the period	149,829	334,663
Cash, cash equivalents and restricted cash, end of the period	329,177	370,318
Interest paid during the period, including payment of early extinguishment of debt charges of $0 and $6,470, respectively (net of capitalized interest of $198 and $102, respectively)	54,847	60,213
Distributions to common and preferred unitholders	(148,882)	(123,758)
Kimco Realty OP, LLC [Member] | Joint Ventures [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	(24,204)	(23,570)
Kimco Realty OP, LLC [Member] | Other Real Estate Investments [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	(2,122)	(5,373)
Equity in income of other investments, net	$ (2,122)	$ (5,373)