Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated Net Income	$ 2,568,707	$ 1,277,324	$ 2,423,188
Adjustments to reconcile consolidated net income to net cash provided by operating activities
Depreciation and amortization	1,325,895	1,354,991	1,394,172
Loss on debt extinguishment	51,841		116,256
(Gain) loss on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net	(206,855)	114,960	(14,883)
Gain on sale or exchange of equity interests	(178,672)
Unrealized losses in fair value of equity instruments	8,095	19,632	8,212
Straight-line lease loss (income)	22,619	19,950	(67,139)
Equity in income of unconsolidated entities	(782,837)	(219,870)	(444,349)
Distributions of income from unconsolidated entities	436,881	184,733	428,769
Changes in assets and liabilities
Tenant receivables and accrued revenue, net	265,352	(415,911)	(157)
Deferred costs and other assets	(77,592)	(28,191)	(49,338)
Accounts payable, accrued expenses, intangibles, deferred revenues and other	203,968	19,080	13,100
Net cash provided by operating activities	3,637,402	2,326,698	3,807,831
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(257,080)	(3,606,694)	(12,800)
Funding of loans to related parties	(15,848)	(8,236)
Repayments of loans to related parties	14,027		7,641
Capital expenditures, net	(527,935)	(484,119)	(876,011)
Cash impact from the consolidation of properties	5,595		1,045
Net proceeds from sale of assets	3,000	33,418	6,776
Investments in unconsolidated entities	(56,901)	(191,368)	(63,789)
Purchase of equity instruments	(33,605)	(32,955)	(374,231)
Proceeds from sales of equity instruments	65,504	30,000
Insurance proceeds for property restoration	7,200	31,198	5,662
Distributions of capital from unconsolidated entities and other	243,279	250,358	229,000
Net cash used in investing activities	(552,764)	(3,978,398)	(1,076,707)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sales of common stock and other, net of transaction costs	(328)	1,556,148	(328)
Purchase of shares related to stock grant recipients' tax withholdings	(2,318)	(854)	(2,955)
Redemption of limited partner units	(2,220)	(16,106)	(6,846)
Purchase of treasury stock		(152,589)	(359,773)
Proceeds from the special purpose acquisition company IPO, net of transaction costs	338,121
Establishment of trust account for special purpose acquisition company	(345,000)
Distributions to noncontrolling interest holders in properties	(5,024)	(8,271)	(41,549)
Contributions from noncontrolling interest holders in properties	20,902	220	139
Preferred distributions of the Operating Partnership	(1,915)	(1,915)	(1,915)
Distributions to stockholders and preferred dividends	(2,351,764)	(1,443,183)	(2,558,944)
Distributions to limited partners	(337,021)	(219,095)	(388,542)
Cash paid to extinguish debt	(50,156)		(99,975)
Proceeds from issuance of debt, net of transaction costs	9,251,217	15,234,860	13,312,301
Repayments of debt	(10,076,809)	(12,955,275)	(12,427,699)
Net cash (used in) provided by financing activities	(3,562,315)	1,993,940	(2,576,086)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(477,677)	342,240	155,038
CASH AND CASH EQUIVALENTS, beginning of period	1,011,613	669,373	514,335
CASH AND CASH EQUIVALENTS, end of period	533,936	1,011,613	669,373
Simon Property Group, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated Net Income	2,568,707	1,277,324	2,423,188
Adjustments to reconcile consolidated net income to net cash provided by operating activities
Depreciation and amortization	1,325,895	1,354,991	1,394,172
Loss on debt extinguishment	51,841		116,256
(Gain) loss on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net	(206,855)	114,960	(14,883)
Gain on sale or exchange of equity interests	(178,672)
Unrealized losses in fair value of equity instruments	8,095	19,632	8,212
Straight-line lease loss (income)	22,619	19,950	(67,139)
Equity in income of unconsolidated entities	(782,837)	(219,870)	(444,349)
Distributions of income from unconsolidated entities	436,881	184,733	428,769
Changes in assets and liabilities
Tenant receivables and accrued revenue, net	265,352	(415,911)	(157)
Deferred costs and other assets	(77,592)	(28,191)	(49,338)
Accounts payable, accrued expenses, intangibles, deferred revenues and other	203,968	19,080	13,100
Net cash provided by operating activities	3,637,402	2,326,698	3,807,831
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(257,080)	(3,606,694)	(12,800)
Funding of loans to related parties	(15,848)	(8,236)
Proceeds on loans to related parties	14,027		7,641
Capital expenditures, net	(527,935)	(484,119)	(876,011)
Cash impact from the consolidation of properties	5,595		1,045
Net proceeds from sale of assets	3,000	33,418	6,776
Investments in unconsolidated entities	(56,901)	(191,368)	(63,789)
Purchase of equity instruments	(33,605)	(32,955)	(374,231)
Proceeds from sales of equity instruments	65,504	30,000
Insurance proceeds for property restoration	7,200	31,198	5,662
Distributions of capital from unconsolidated entities and other	243,279	250,358	229,000
Net cash used in investing activities	(552,764)	(3,978,398)	(1,076,707)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sales of common stock and other, net of transaction costs	(328)	1,556,148	(328)
Purchase of shares related to stock grant recipients' tax withholdings	(2,318)	(854)	(2,955)
Redemption of limited partner units	(2,220)	(16,106)	(6,846)
Purchase of general partner units		(152,589)	(359,773)
Proceeds from the special purpose acquisition company IPO, net of transaction costs	338,121
Establishment of trust account for special purpose acquisition company	(345,000)
Distributions to noncontrolling interest holders in properties	(5,024)	(8,271)	(41,549)
Contributions from noncontrolling interest holders in properties	20,902	220	139
Preferred distributions of the Operating Partnership	(2,690,700)	(1,664,193)	(2,949,401)
Cash paid to extinguish debt	(50,156)		(99,975)
Proceeds from issuance of debt, net of transaction costs	9,251,217	15,234,860	13,312,301
Repayments of debt	(10,076,809)	(12,955,275)	(12,427,699)
Net cash (used in) provided by financing activities	(3,562,315)	1,993,940	(2,576,086)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(477,677)	342,240	155,038
CASH AND CASH EQUIVALENTS, beginning of period	1,011,613	669,373	514,335
CASH AND CASH EQUIVALENTS, end of period	$ 533,936	$ 1,011,613	$ 669,373