Unaudited Consolidated Statements of Equity - USD ($) $ in Thousands	Simon Property Group, L.P. General Partner	Simon Property Group, L.P. Limited Partner	Simon Property Group, L.P. Preferred Stock [Member]	Simon Property Group, L.P. Noncontrolling Interests	Simon Property Group, L.P.	Preferred Stock [Member] Series J Preferred stock	Common Stock	AOCI Attributable to Parent [Member]	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, 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
Unrealized gain on hedging activities					20,992								20,992
Currency translation adjustments					(33,687)								(33,687)
Changes in available-for-sale securities and other					1,264								1,264
Net gain reclassified from accumulated other comprehensive loss into earnings					(1,198)								(1,198)
Balance at Jun. 30, 2023	2,830,367	408,371	41,270	20,563	3,300,571	41,270	34	(175,967)	11,211,425	(6,189,540)	(2,015,585)	428,934	3,300,571
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
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(26,309)		26,309
Redemption of limited partner units	(7,215)	(649)			(7,864)				(7,215)			(649)	(7,864)
Amortization of stock incentive	10,895				10,895				10,895				10,895
Long-term incentive performance units		2,617			2,617							2,617	2,617
Issuance of unit equivalents and other	(3,938)	5		13	(3,920)				2	(770)	(3,171)	18	(3,921)
Unrealized gain on hedging activities	13,398	1,922			15,320			13,398				1,922	15,320
Currency translation adjustments	(28,837)	(4,099)			(32,936)			(28,837)				(4,099)	(32,936)
Changes in available-for-sale securities and other	935	135			1,070			935				135	1,070
Net gain reclassified from accumulated other comprehensive loss into earnings	(609)	(88)			(697)			(609)				(88)	(697)
Other comprehensive income (loss)	(15,113)	(2,130)			(17,243)			(15,113)				(2,130)	(17,243)
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	2,581	(2,581)							2,581			(2,581)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(606,181)		(87,399)	(693,580)
Distributions to other noncontrolling interest partners												(772)	(772)
Distributions, excluding distributions on preferred interests classified as temporary equity	(605,347)	(87,399)	(834)	(772)	(694,352)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	486,343	70,213	834	258	557,648					487,178		70,471	557,649
Balance at Jun. 30, 2023	2,830,367	408,371	41,270	20,563	3,300,571	41,270	34	(175,967)	11,211,425	(6,189,540)	(2,015,585)	428,934	3,300,571
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
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
Unrealized gain on hedging activities					44,016								44,016
Currency translation adjustments					(33,614)								(33,614)
Changes in available-for-sale securities and other					(712)								(712)
Net gain reclassified from accumulated other comprehensive loss into earnings					(2,879)								(2,879)
Balance at Jun. 30, 2024						40,942	33	(166,904)	11,362,588	(6,155,936)	(2,136,137)	453,428	3,398,014
Balance at Jun. 30, 2024	2,903,644	434,982	40,942	18,446	3,398,014
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
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(22,365)		22,365
Redemption of limited partner units	(139)	(9)			(148)				(139)			(9)	(148)
Amortization of stock incentive	9,750				9,750				9,750				9,750
Long-term incentive performance units		4,326			4,326							4,326	4,326
Issuance of unit equivalents and other	(15,876)	1		(85)	(15,960)					(9,756)	(6,120)	(84)	(15,960)
Unrealized gain on hedging activities	14,155	2,117			16,272			14,155				2,117	16,272
Currency translation adjustments	(14,086)	(2,099)			(16,185)			(14,086)				(2,099)	(16,185)
Changes in available-for-sale securities and other	(74)	(12)			(86)			(74)				(12)	(86)
Net gain reclassified from accumulated other comprehensive loss into earnings	(1,103)	(165)			(1,268)			(1,103)				(165)	(1,268)
Other comprehensive income (loss)	(1,108)	(159)			(1,267)			(1,108)				(159)	(1,267)
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	4,602	(4,602)							4,602			(4,602)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(652,966)		(97,810)	(750,776)
Distributions to other noncontrolling interest partners												(1,066)	(1,066)
Distributions, excluding distributions on preferred interests classified as temporary equity	(652,131)	(97,810)	(835)	(1,066)	(751,842)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	493,465	73,919	835	422	568,641
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties										494,300		74,341	568,641
Balance at Jun. 30, 2024						$ 40,942	$ 33	$ (166,904)	$ 11,362,588	$ (6,155,936)	$ (2,136,137)	$ 453,428	$ 3,398,014
Balance at Jun. 30, 2024	$ 2,903,644	$ 434,982	$ 40,942	$ 18,446	$ 3,398,014