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, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Significant Accounting Policies
Total accumulated other comprehensive income (loss)	$ (199,500)				$ (175,100)				$ (199,500)	$ (175,100)	$ (136,200)
Gain (loss) on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net									5,647	206,855	(114,960)
Interest expense									(761,253)	(795,712)	(784,400)
Loss on extinguishment of debt										(51,841)
Net income attributable to noncontrolling interests									(312,850)	(319,076)	(164,760)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 673,786	$ 539,038	$ 496,743	$ 426,630	$ 503,241	$ 679,936	$ 617,257	$ 445,860	2,136,198	2,246,294	1,109,227
Currency translation adjustments | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Gain (loss) on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net										5,660	(1,739)
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)	219
Currency translation adjustments. | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS										4,948	(1,520)
Accumulated derivative losses, net, including noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Interest expense									1,595	1,625	1,845
Accumulated derivative losses, attributable to noncontrolling interests | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Net income attributable to noncontrolling interests									(202)	(204)	(232)
Accumulated derivative gains (losses), net | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS									$ 1,393	$ 1,421	$ 1,613