Summary of Significant Accounting Policies - Reclassification Out of AOCI, Simon Property Group, Inc. (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Accounting Policies
Total accumulated other comprehensive income (loss)	$ (221,600)				$ (199,500)				$ (221,600)	$ (199,500)	$ (175,100)
(Loss) gain on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net									(3,056)	5,647	206,855
Interest expense									(854,648)	(761,253)	(795,712)
Net income attributable to noncontrolling interests									(333,892)	(312,850)	(319,076)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 747,480	$ 594,139	$ 486,343	$ 451,827	$ 673,786	$ 539,038	$ 496,743	$ 426,630	2,279,789	2,136,198	2,246,294
Currency translation adjustments | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
(Loss) gain on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net											5,660
Currency translation adjustments, attributable to noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Net income attributable to noncontrolling interests											(712)
Currency translation adjustments. | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS											4,948
Accumulated derivative losses, net, including noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Interest expense									4,084	1,595	1,625
Accumulated derivative losses, attributable to noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Net income attributable to noncontrolling interests									(533)	(202)	(204)
Accumulated derivative gains (losses), net | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS									$ 3,551	$ 1,393	$ 1,421