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
Amortization of stock incentive	4,231				4,231				4,231				4,231
Redemption of limited partner units	(34)	(3)			(37)				(34)			(3)	(37)
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	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 to limited partners, excluding 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					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, 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
Amortization of stock incentive	3,705				3,705				3,705				3,705
Redemption of limited partner units	(137)	(10)			(147)				(137)			(10)	(147)
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	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 to limited partners, excluding 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					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