Per Share and Per Unit Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Per Share And Per Unit Data
Net Income attributable to Common Stockholders - Basic	$ 496,743	$ 617,257	$ 923,374	$ 1,063,117
Net Income attributable to Common Stockholders - Diluted	$ 496,743	$ 617,257	$ 923,374	$ 1,063,117
Weighted Average Shares Outstanding - Basic	328,444,627	328,594,136	328,525,043	328,554,537
Weighted Average Shares Outstanding - Diluted	328,444,627	328,594,136	328,525,043	328,554,537
Simon Property Group, L.P.
Per Share And Per Unit Data
Net Income attributable to Common Stockholders - Basic	$ 568,289	$ 706,087	$ 1,056,282	$ 1,216,172
Net Income attributable to Common Stockholders - Diluted	$ 568,288	$ 706,087	$ 1,056,281	$ 1,216,172
Weighted Average Shares Outstanding - Basic	375,754,363	375,875,290	375,811,953	375,856,079
Weighted Average Shares Outstanding - Diluted	375,754,363	375,875,290	375,811,953	375,856,079