Unaudited Consolidated Statements of Equity - USD ($) $ in Thousands	Simon Property Group, L.P. Simon (Managing General Partner)	Simon Property Group, L.P. Limited Partners	Simon Property Group, L.P. Preferred Stock	Simon Property Group, L.P. Noncontrolling Interests	Simon Property Group, L.P.	Preferred Stock Series J Preferred stock	Common Stock.	Accumulated Other Comprehensive Income (Loss)	Capital in Excess of Par Value	Accumulated Deficit	Common Stock Held in Treasury	Noncontrolling Interests	Total
Balance at Dec. 31, 2022						$ 41,435	$ 34	$ (164,873)	$ 11,232,881	$ (5,926,974)	$ (2,043,979)	$ 473,128	$ 3,611,652
Balance at Dec. 31, 2022	$ 3,097,089	$ 448,076	$ 41,435	$ 25,052	$ 3,611,652
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(83)		(83)	(83)							(83)
Stock incentive program									(7,880)		7,880
Redemption of limited partner units	(2,645)	(213)			(2,858)				(2,645)			(213)	(2,858)
Amortization of stock incentive	5,379				5,379				5,379				5,379
Long-term incentive performance units		3,382			3,382							3,382	3,382
Issuance of unit equivalents and other	(7,644)	1		188	(7,455)					(5,020)	(2,624)	189	(7,455)
Unrealized gain on hedging activities	4,959	713			5,672			4,959				713	5,672
Currency translation adjustments	(671)	(80)			(751)			(671)				(80)	(751)
Changes in available-for-sale securities and other	169	25			194			169				25	194
Net gain reclassified from accumulated other comprehensive loss into earnings	(438)	(63)			(501)			(438)				(63)	(501)
Other comprehensive income (loss)	4,019	595			4,614			4,019				595	4,614
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	3,736	(3,736)							3,736			(3,736)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(590,434)		(85,163)	(675,597)
Distributions to other noncontrolling interest partners												(4,366)	(4,366)
Distributions, excluding distributions on preferred interests classified as temporary equity	(589,600)	(85,163)	(834)	(4,366)	(679,963)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	451,827	65,353	834	190	518,204
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties										452,661		65,543	518,204
Balance at Mar. 31, 2023						41,352	34	(160,854)	11,231,471	(6,069,767)	(2,038,723)	449,359	3,452,872
Balance at Mar. 31, 2023	2,962,161	428,295	41,352	21,064	3,452,872
Balance at Dec. 31, 2023						41,106	33	(172,787)	11,406,236	(6,095,576)	(2,156,178)	468,815	3,491,649
Balance at Dec. 31, 2023	2,981,728	447,494	41,106	21,321	3,491,649
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(8,234)		8,234
Redemption of limited partner units	(38,160)	(2,556)			(40,716)				(38,160)			(2,556)	(40,716)
Amortization of stock incentive	5,118				5,118				5,118				5,118
Long-term incentive performance units		4,765			4,765							4,765	4,765
Issuance of unit equivalents and other	7,540	(1)		(251)	7,288				(1)	11,979	(4,438)	(252)	7,288
Unrealized gain on hedging activities	24,138	3,606			27,744			24,138				3,606	27,744
Currency translation adjustments	(15,201)	(2,228)			(17,429)			(15,201)				(2,228)	(17,429)
Changes in available-for-sale securities and other	(545)	(81)			(626)			(545)				(81)	(626)
Net gain reclassified from accumulated other comprehensive loss into earnings	(1,401)	(210)			(1,611)			(1,401)				(210)	(1,611)
Other comprehensive income (loss)	6,991	1,087			8,078			6,991				1,087	8,078
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	5,781	(5,781)							5,781			(5,781)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(636,453)		(95,349)	(731,802)
Distributions to other noncontrolling interest partners												(2,040)	(2,040)
Distributions, excluding distributions on preferred interests classified as temporary equity	(635,619)	(95,349)	(834)	(2,040)	(733,842)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	731,702	109,657	834	145	842,338
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties										732,536		109,802	842,338
Balance at Mar. 31, 2024						$ 41,024	$ 33	$ (165,796)	$ 11,370,740	$ (5,987,514)	$ (2,152,382)	$ 478,491	$ 3,584,596
Balance at Mar. 31, 2024	$ 3,065,081	$ 459,316	$ 41,024	$ 19,175	$ 3,584,596