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	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 (loss) 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 attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties	451,827	65,353	834	190	518,204					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 (loss) on hedging activities					62,305								62,305
Currency translation adjustments					(34,746)								(34,746)
Changes in available-for-sale securities and other					903								903
Net gain reclassified from accumulated other comprehensive loss into earnings					(1,869)								(1,869)
Balance at Sep. 30, 2023						41,188	34	(140,987)	11,392,636	(6,218,936)	(2,121,201)	457,674	3,410,408
Balance at Sep. 30, 2023	2,911,546	436,693	41,188	20,981	3,410,408
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 (loss) 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 attributable to preferred interests in the Operating Partnership and 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						41,270	34	(175,967)	11,211,425	(6,189,540)	(2,015,585)	428,934	3,300,571
Balance at Jun. 30, 2023	2,830,367	408,371	41,270	20,563	3,300,571
Increase (Decrease) in Stockholders' Equity
Issuance of limited partner units		197,426			197,426							197,426	197,426
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Redemption of limited partner units	(143)	(11)			(154)				(143)			(11)	(154)
Amortization of stock incentive	7,977				7,977				7,977				7,977
Treasury stock purchase											(105,616)		(105,616)
Treasury unit purchase	(105,616)				(105,616)
Long-term incentive performance units		3,446			3,446							3,446	3,446
Issuance of unit equivalents and other	(1,825)	2		1,080	(743)				5	(1,830)		1,082	(743)
Unrealized gain (loss) on hedging activities	35,653	5,660			41,314			35,653				5,660	41,314
Currency translation adjustments	215	(1,274)			(1,059)			215				(1,274)	(1,059)
Changes in available-for-sale securities and other	(310)	(51)			(361)			(310)				(51)	(361)
Net gain reclassified from accumulated other comprehensive loss into earnings	(578)	(93)			(671)			(578)				(93)	(671)
Other comprehensive income (loss)	34,980	4,242			39,222			34,980				4,242	39,222
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	173,372	(173,372)							173,372			(173,372)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(622,540)		(89,869)	(712,409)
Distributions to other noncontrolling interest partners												(533)	(533)
Distributions, excluding distributions on preferred interests classified as temporary equity	(621,705)	(89,869)	(835)	(533)	(712,942)
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties	594,139	86,458	835	(129)	681,303					594,974		86,329	681,303
Balance at Sep. 30, 2023						41,188	34	(140,987)	11,392,636	(6,218,936)	(2,121,201)	457,674	3,410,408
Balance at Sep. 30, 2023	2,911,546	436,693	41,188	20,981	3,410,408
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 (loss) 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 attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties	731,702	109,657	834	145	842,338					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 (loss) on hedging activities					(10,281)								(10,281)
Currency translation adjustments					(25,668)								(25,668)
Changes in available-for-sale securities and other					1,385								1,385
Net gain reclassified from accumulated other comprehensive loss into earnings					(4,168)								(4,168)
Balance at Sep. 30, 2024						40,860	33	(206,340)	11,343,428	(6,358,449)	(2,106,396)	426,221	3,139,357
Balance at Sep. 30, 2024	2,672,276	402,919	40,860	23,302	3,139,357
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 (loss) 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 attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties	493,465	73,919	835	422	568,641					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
Increase (Decrease) in Stockholders' Equity
Exchange of limited partner units									490			(490)
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Limited partner units exchanged to common units	490	(490)
Stock incentive program									(29,741)		29,741
Amortization of stock incentive	7,799				7,799				7,799				7,799
Long-term incentive performance units		5,668			5,668							5,668	5,668
Issuance of unit equivalents and other	(8,776)	1		4,872	(3,903)					(8,776)		4,873	(3,903)
Unrealized gain (loss) on hedging activities	(47,257)	(7,040)			(54,297)			(47,257)				(7,040)	(54,297)
Currency translation adjustments	7,116	830			7,946			7,116				830	7,946
Changes in available-for-sale securities and other	1,823	274			2,096			1,823				274	2,096
Net gain reclassified from accumulated other comprehensive loss into earnings	(1,118)	(171)			(1,289)			(1,118)				(171)	(1,289)
Other comprehensive income (loss)	(39,436)	(6,107)			(45,543)			(39,436)				(6,107)	(45,543)
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	2,292	(2,292)							2,292			(2,292)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(669,732)		(100,162)	(769,894)
Distributions to other noncontrolling interest partners												(454)	(454)
Distributions, excluding distributions on preferred interests classified as temporary equity	(668,898)	(100,162)	(834)	(454)	(770,348)
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties	475,161	71,319	834	438	547,752					475,995		71,757	547,752
Balance at Sep. 30, 2024						$ 40,860	$ 33	$ (206,340)	$ 11,343,428	$ (6,358,449)	$ (2,106,396)	$ 426,221	$ 3,139,357
Balance at Sep. 30, 2024	$ 2,672,276	$ 402,919	$ 40,860	$ 23,302	$ 3,139,357