Consolidated Statements of Equity (Parenthetical) - USD ($)	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Exchange of limited partner units, (in shares)	61,968		132,946			24,000
Stock incentive program, units, net - shares forfeited	3,825		1,081
Stock incentive program, shares, net		155,610		1,534	89,368
Redemption of Limited Partner Units	586		116,072	27,214		774
Treasury stock purchase, shares			1,245,654	1,154,117	1,046,580	46,377
Shares repurchased		15,561			14,853	1,483
Net income attributable to preferred interests in the Operating Partnership (in dollars)	$ 479,000	$ 478,000	$ 479,000	$ 479,000	$ 478,000	$ 479,000
Net loss (gain) attributable to noncontrolling redeemable interests in properties (in dollars)	$ 505,000	$ 3,921,000	$ 608,000	$ (5,000)	$ 28,000	$ 1,065,000
Simon Property Group, L.P.
Limited partner units exchanged to common units	61,968		132,946			24,000
Stock incentive program, units, net - shares forfeited	3,825		1,081
Stock incentive program, units, net		155,610		1,534	89,368
Redemption of Limited Partner Units	586		116,072	27,214		774
Treasury unit purchase, units			1,245,654	1,154,117	1,046,580	46,377
Issuance of equivalents units	632	1,264			14,853
Issuance of common units		$ 15,561	$ 38,148			$ 1,483
Net income, attributable to preferred distributions on temporary equity preferred units (in dollars)	$ 479,000	478,000	479,000	$ 479,000	$ 478,000	479,000
Net loss (gain) attributable to noncontrolling redeemable interests in properties (in dollars)	$ 505,000	$ 3,921,000	$ 608,000	$ (5,000)	$ 28,000	$ 1,065,000