Equity - Shares or Units Activity (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended						9 Months Ended
	Feb. 08, 2024 USD ($)	Nov. 01, 2024 $ / shares	Sep. 30, 2024 $ / shares shares	Jun. 30, 2024 shares	Mar. 31, 2024 shares	Sep. 30, 2023 shares	Jun. 30, 2023 shares	Mar. 31, 2023 shares	Sep. 30, 2024 USD ($) item $ / shares shares	Sep. 30, 2023 $ / shares
Equity
Shares of common stock issued to limited partners in exchange for units			55,000
Common stock dividend per share (in $ per share) | $ / shares			$ 2.05						$ 6.00	$ 5.55
Number of units redeemed (in units)				1,000	279,350	1,250	71,630	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)						951,627			0
Subsequent Event | Q4 Dividend
Equity
Dividends declared per common share (in dollars per share) | $ / shares		$ 2.10
Dividends Payable, Date Declared		Nov. 01, 2024
Dividends Payable, Date to be Paid		Dec. 30, 2024
Dividends Payable, Date of Record		Dec. 09, 2024
Simon Property Group, L.P.
Equity
Number of units redeemed (in units)				1,000	279,350	1,250	71,630	22,442
Distributions paid per unit (in dollars per unit) | $ / shares			$ 2.05						$ 6.00	$ 5.55
Simon Property Group, L.P. | Subsequent Event | Q4 Dividend
Equity
Distribution declared per unit (in dollars per share) | $ / shares		$ 2.10
Dividends Payable, Date Declared		Nov. 01, 2024
Dividends Payable, Date to be Paid		Dec. 30, 2024
Dividends Payable, Date of Record		Dec. 09, 2024
Simon Property Group, L.P. | Limited Partner
Equity
Shares of common stock issued to limited partners in exchange for units									55,000
Number of units redeemed (in units)									280,350
Number of limited partners whose common stock redeemed | item									6
Value of units redeemed | $									$ 40.9