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, 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)
Series J preferred stock premium amortization			(82)		(82)	(82)							(82)
Limited partner units exchanged to common units	27	(27)
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 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					44,858								44,858
Currency translation adjustments					(23,339)								(23,339)
Changes in available-for-sale securities and other					(1,073)								(1,073)
Net gain reclassified from accumulated other comprehensive loss into earnings					(789)								(789)
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
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 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
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						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
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
Net income, excluding attributable to preferred interests in the Operating Partnership and attributable to noncontrolling redeemable interests in properties										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