Equity - Shares or Units Activity (Details) $ / shares in Units, $ in Millions				3 Months Ended
	May 06, 2024 $ / shares	Feb. 08, 2024 USD ($)	Sep. 07, 2023 shares	Mar. 31, 2024 USD ($) item $ / shares shares	Mar. 31, 2023 $ / shares shares
Equity
Common stock dividend per share (in $ per share) | $ / shares				$ 1.95	$ 1.80
Number of units redeemed (in units)				279,350	22,442
Common stock authorized for repurchase | $		$ 2,000.0
Period in which common stock is authorized to be repurchased (in years)		2 years
Shares repurchased (in shares)				0
Subsequent Event
Equity
Dividends declared per common share (in dollars per share) | $ / shares	$ 2.00
Simon Property Group, L.P.
Equity
Number of units redeemed (in units)				279,350	22,442
Distributions paid per unit (in dollars per unit) | $ / shares				$ 1.95	$ 1.80
Simon Property Group, L.P. | Subsequent Event
Equity
Distribution declared per unit (in dollars per share) | $ / shares	$ 2.00
Simon Property Group, L.P. | TRG
Equity
Number of units issued in connection with acquisition (in units)			1,725,000
Simon Property Group, L.P. | Limited Partners
Equity
Number of units redeemed (in units)				279,350
Number of limited partners whose common stock redeemed | item				5
Value of units redeemed | $				$ 40.7