Equity - Shares or Units Activity (Details) $ / shares in Units, $ in Thousands			3 Months Ended				6 Months Ended
	Aug. 01, 2022 $ / shares	May 09, 2022 USD ($)	Jun. 30, 2022 $ / shares shares	Mar. 31, 2022 shares	Jun. 30, 2021 shares	Mar. 31, 2021 shares	Jun. 30, 2022 USD ($) item $ / shares shares	Jun. 30, 2021 $ / shares
Equity
Redemption of units			12,930	1,000	170	316
Common stock authorized for repurchase | $		$ 2,000,000
Period common stock is authorized to repurchase		2 years
Shares repurchased (in shares)			1,424,096				1,424,096
Average share price repurchased (in dollars per share) | $ / shares							$ 101.20
Common stock dividends paid (in dollars per share) | $ / shares			$ 1.70				3.35	$ 2.60
Subsequent Event
Equity
Dividends declared per common share (in dollars per share) | $ / shares	$ 1.75
Simon Property Group, L.P.
Equity
Redemption of units			12,930	1,000	170	316
Distributions paid per unit (in dollars per unit) | $ / shares			$ 1.70				$ 3.35	$ 2.60
Simon Property Group, L.P. | Limited Partners
Equity
Units issued							2,680
Number of limited partners who received common stock | item							2
Redemption of units							13,930
Number of limited partners whose common stock redeemed | item							2
Value of units redeemed | $							$ 1,800