Summary of Significant Accounting Policies - Reclassification Out of AOCI, Simon Property Group, Inc. (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Significant Accounting Policies
Total accumulated other comprehensive income (loss)	$ (250,900)		$ (250,900)		$ (221,600)
Interest expense	(221,338)	$ (218,086)	(451,960)	$ (417,515)
Net income attributable to noncontrolling interests	(75,136)	(70,328)	(183,755)	(136,921)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	493,465	486,343	1,225,167	938,170
Accumulated derivative losses, net, including noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Interest expense	1,268	697	2,879	1,198
Accumulated derivative losses, attributable to noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Net income attributable to noncontrolling interests	(165)	(88)	(375)	(151)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 1,103	$ 609	$ 2,504	$ 1,047