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	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, 2020						$ 42,091	$ 34	$ (188,675)	$ 11,179,688	$ (6,102,314)	$ (1,891,352)	$ 432,874	$ 3,472,346
Balance at Dec. 31, 2020	$ 2,997,381	$ 431,784	$ 42,091	$ 1,090	$ 3,472,346
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(7,214)		7,214
Redemption of limited partner units	(34)	(3)			(37)				(34)			(3)	(37)
Amortization of stock incentive	4,231				4,231				4,231				4,231
Long-term incentive performance units		5,014			5,014							5,014	5,014
Issuance of unit equivalents and other	(6,994)			15,822	8,828				(4,313)	(2,681)		15,822	8,828
Unrealized gain on hedging activities	31,333	4,514			35,847			31,333				4,514	35,847
Currency translation adjustments	(20,878)	(3,005)			(23,883)			(20,878)				(3,005)	(23,883)
Changes in available-for-sale securities and other	(276)	(40)			(316)			(276)				(40)	(316)
Net gain reclassified from accumulated other comprehensive loss into earnings	(5,370)	(773)			(6,143)			(5,370)				(773)	(6,143)
Other comprehensive income (loss)	4,809	696			5,505			4,809				696	5,505
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	4,849	(4,849)							4,849			(4,849)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(428,712)		(61,558)	(490,270)
Distributions to other noncontrolling interest partners												(577)	(577)
Distributions, excluding distributions on preferred interests classified as temporary equity	(427,878)	(61,558)	(834)	(577)	(490,847)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	445,860	64,225	834	(41)	510,878
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										446,694		64,184	510,878
Balance at Mar. 31, 2021						42,009	34	(183,866)	11,177,207	(6,087,013)	(1,884,138)	451,603	3,515,836
Balance at Mar. 31, 2021	3,022,224	435,309	42,009	16,294	3,515,836
Balance at Dec. 31, 2020						42,091	34	(188,675)	11,179,688	(6,102,314)	(1,891,352)	432,874	3,472,346
Balance at Dec. 31, 2020	2,997,381	431,784	42,091	1,090	3,472,346
Increase (Decrease) in Stockholders' Equity
Unrealized gain on hedging activities					45,366								45,366
Currency translation adjustments					(40,968)								(40,968)
Changes in available-for-sale securities and other					(304)								(304)
Net gain reclassified from accumulated other comprehensive loss into earnings					(7,022)								(7,022)
Balance at Sep. 30, 2021						41,845	34	(191,274)	11,201,333	(5,789,329)	(1,884,511)	496,594	3,874,692
Balance at Sep. 30, 2021	3,336,253	479,827	41,845	16,767	3,874,692
Balance at Mar. 31, 2021						42,009	34	(183,866)	11,177,207	(6,087,013)	(1,884,138)	451,603	3,515,836
Balance at Mar. 31, 2021	3,022,224	435,309	42,009	16,294	3,515,836
Increase (Decrease) in Stockholders' Equity
Exchange of limited partner units									539			(539)
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Limited partner units exchanged to common units	539	(539)
Stock incentive program									(1,945)		1,945
Redemption of limited partner units	(19)	(1)			(20)				(19)			(1)	(20)
Amortization of stock incentive	5,204				5,204				5,204				5,204
Long-term incentive performance units		5,333			5,333							5,333	5,333
Issuance of unit equivalents and other	5,806			1,135	6,941				9,336	(1,212)	(2,318)	1,135	6,941
Unrealized gain on hedging activities	1,079	160			1,239			1,079				160	1,239
Currency translation adjustments	(5,176)	(710)			(5,886)			(5,176)				(710)	(5,886)
Changes in available-for-sale securities and other	72	10			82			72				10	82
Net gain reclassified from accumulated other comprehensive loss into earnings	(416)	(59)			(475)			(416)				(59)	(475)
Other comprehensive income (loss)	(4,441)	(599)			(5,040)			(4,441)				(599)	(5,040)
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	3,452	(3,452)							3,452			(3,452)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(460,986)		(66,105)	(527,091)
Distributions to other noncontrolling interest partners												(54)	(54)
Distributions, excluding distributions on preferred interests classified as temporary equity	(460,151)	(66,105)	(835)	(54)	(527,145)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	617,257	88,830	835	(510)	706,412
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										618,092		88,320	706,412
Balance at Jun. 30, 2021						41,927	34	(188,307)	11,193,774	(5,931,119)	(1,884,511)	475,641	3,707,439
Balance at Jun. 30, 2021	3,189,871	458,776	41,927	16,865	3,707,439
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Amortization of stock incentive	4,718				4,718				4,718				4,718
Long-term incentive performance units		(2,475)			(2,475)							(2,475)	(2,475)
Issuance of unit equivalents and other	(44,669)	(1)		(380)	(45,050)					(44,669)		(381)	(45,050)
Unrealized gain on hedging activities	7,239	1,040			8,280			7,239				1,040	8,280
Currency translation adjustments	(9,790)	(1,409)			(11,199)			(9,790)				(1,409)	(11,199)
Changes in available-for-sale securities and other	(62)	(9)			(71)			(62)				(9)	(71)
Net gain reclassified from accumulated other comprehensive loss into earnings	(354)	(50)			(404)			(354)				(50)	(404)
Other comprehensive income (loss)	(2,967)	(428)			(3,395)			(2,967)				(428)	(3,395)
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	2,841	(2,841)							2,841			(2,841)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(494,311)		(71,009)	(565,320)
Distributions to other noncontrolling interest partners												(54)	(54)
Distributions, excluding distributions on preferred interests classified as temporary equity	(493,477)	(71,009)	(834)	(54)	(565,374)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	679,936	97,805	834	336	778,911
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										680,770		98,141	778,911
Balance at Sep. 30, 2021						41,845	34	(191,274)	11,201,333	(5,789,329)	(1,884,511)	496,594	3,874,692
Balance at Sep. 30, 2021	3,336,253	479,827	41,845	16,767	3,874,692
Balance at Dec. 31, 2021						41,763	34	(185,186)	11,212,990	(5,823,708)	(1,884,441)	491,533	3,852,985
Balance at Dec. 31, 2021	3,319,689	477,292	41,763	14,241	3,852,985
Increase (Decrease) in Stockholders' Equity
Exchange of limited partner units									27			(27)
Issuance of limited partner units	27	(27)
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(6,864)		6,864
Redemption of limited partner units	(137)	(10)			(147)				(137)			(10)	(147)
Amortization of stock incentive	3,705				3,705				3,705				3,705
Long-term incentive performance units		3,895			3,895							3,895	3,895
Issuance of unit equivalents and other	(12,763)	(2)		(260)	(13,025)				1	(9,007)	(3,757)	(262)	(13,025)
Unrealized gain on hedging activities	14,715	2,118			16,833			14,715				2,118	16,833
Currency translation adjustments	1,170	135			1,305			1,170				135	1,305
Changes in available-for-sale securities and other	(455)	(66)			(521)			(455)				(66)	(521)
Net gain reclassified from accumulated other comprehensive loss into earnings	(338)	(49)			(387)			(338)				(49)	(387)
Other comprehensive income (loss)	15,092	2,138			17,230			15,092				2,138	17,230
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	3,899	(3,899)							3,899			(3,899)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(543,010)		(78,024)	(621,034)
Distributions to other noncontrolling interest partners												(60)	(60)
Distributions, excluding distributions on preferred interests classified as temporary equity	(542,176)	(78,024)	(834)	(60)	(621,094)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	426,630	61,363	834	273	489,100
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										427,464		61,636	489,100
Balance at Mar. 31, 2022						41,681	34	(170,094)	11,213,621	(5,948,261)	(1,881,334)	476,920	3,732,567
Balance at Mar. 31, 2022	3,213,966	462,726	41,681	14,194	3,732,567
Balance at Dec. 31, 2021						41,763	34	(185,186)	11,212,990	(5,823,708)	(1,884,441)	491,533	3,852,985
Balance at Dec. 31, 2021	3,319,689	477,292	41,763	14,241	3,852,985
Increase (Decrease) in Stockholders' Equity
Unrealized gain on hedging activities					80,327								80,327
Currency translation adjustments					(49,482)								(49,482)
Changes in available-for-sale securities and other					(1,619)								(1,619)
Net gain reclassified from accumulated other comprehensive loss into earnings					(1,191)								(1,191)
Balance at Sep. 30, 2022						41,517	34	(160,549)	11,231,483	(6,046,981)	(2,043,979)	455,554	3,477,079
Balance at Sep. 30, 2022	2,980,008	431,145	41,517	24,409	3,477,079
Balance at Mar. 31, 2022						41,681	34	(170,094)	11,213,621	(5,948,261)	(1,881,334)	476,920	3,732,567
Balance at Mar. 31, 2022	3,213,966	462,726	41,681	14,194	3,732,567
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Stock incentive program									(20,773)		20,773
Redemption of limited partner units	(1,484)	(126)			(1,610)				(1,484)			(126)	(1,610)
Amortization of stock incentive	8,662				8,662				8,662				8,662
Treasury stock purchase											(144,114)		(144,114)
Treasury unit purchase	(144,114)				(144,114)
Long-term incentive performance units		1,826			1,826							1,826	1,826
Issuance of unit equivalents and other	(5,936)	5		7,910	1,979				101	(3,006)	(3,031)	7,915	1,979
Unrealized gain on hedging activities	24,484	3,540			28,024			24,484				3,540	28,024
Currency translation adjustments	(21,452)	(3,192)			(24,644)			(21,452)				(3,192)	(24,644)
Changes in available-for-sale securities and other	(482)	(70)			(552)			(482)				(70)	(552)
Net gain reclassified from accumulated other comprehensive loss into earnings	(351)	(50)			(401)			(351)				(50)	(401)
Other comprehensive income (loss)	2,199	228			2,427			2,199				228	2,427
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	17,930	(17,930)							17,930			(17,930)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(559,069)		(80,478)	(639,547)
Distributions to other noncontrolling interest partners												(52)	(52)
Distributions, excluding distributions on preferred interests classified as temporary equity	(558,234)	(80,478)	(835)	(52)	(639,599)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	496,744	71,545	835	(258)	568,866
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										497,579		71,287	568,866
Balance at Jun. 30, 2022						41,599	34	(167,895)	11,218,057	(6,012,757)	(2,007,706)	459,590	3,530,922
Balance at Jun. 30, 2022	3,029,733	437,796	41,599	21,794	3,530,922
Increase (Decrease) in Stockholders' Equity
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Amortization of stock incentive	5,651				5,651				5,651				5,651
Treasury stock purchase	(36,273)				(36,273)						(36,273)		(36,273)
Long-term incentive performance units		3,070			3,070							3,070	3,070
Issuance of unit equivalents and other	1,429	2		1,971	3,402				1,986	(557)		1,973	3,402
Unrealized gain on hedging activities	30,982	4,488			35,470			30,982				4,488	35,470
Currency translation adjustments	(22,807)	(3,336)			(26,143)			(22,807)				(3,336)	(26,143)
Changes in available-for-sale securities and other	(477)	(69)			(546)			(477)				(69)	(546)
Net gain reclassified from accumulated other comprehensive loss into earnings	(352)	(51)			(403)			(352)				(51)	(403)
Other comprehensive income (loss)	7,346	1,032			8,378			7,346				1,032	8,378
Adjustment to limited partners' interest from change in ownership in the Operating Partnership	5,789	(5,789)							5,789			(5,789)
Distributions to common stockholders and limited partners, excluding Operating Partnership preferred interests										(573,539)		(82,846)	(656,385)
Distributions to other noncontrolling interest partners												(722)	(722)
Distributions, excluding distributions on preferred interests classified as temporary equity	(572,705)	(82,846)	(834)	(722)	(657,107)
Net income, excluding preferred distributions on temporary equity preferred units and amounts attributable to noncontrolling redeemable interests in properties	539,038	77,880	834	1,366	619,118
Net income, excluding attributable to preferred interests in the Operating Partnership and a loss attributable to noncontrolling redeemable interests in properties										539,872		79,246	619,118
Balance at Sep. 30, 2022						$ 41,517	$ 34	$ (160,549)	$ 11,231,483	$ (6,046,981)	$ (2,043,979)	$ 455,554	$ 3,477,079
Balance at Sep. 30, 2022	$ 2,980,008	$ 431,145	$ 41,517	$ 24,409	$ 3,477,079