Per Share and Per Unit Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Per Share And Per Unit Data
Net Income attributable to Common Stockholders — Basic	$ 504,744	$ 420,009	$ 1,441,128	$ 1,432,086
Net Income attributable to Common Stockholders - Diluted	$ 504,744	$ 420,009	$ 1,441,128	$ 1,432,086
Weighted Average Shares Outstanding — Basic and Diluted	314,234,418	309,417,298	312,356,986	310,333,248
Simon Property Group L.P.
Per Share And Per Unit Data
Net Income attributable to Common Stockholders — Basic	$ 581,266	$ 490,344	$ 1,668,509	$ 1,673,380
Net Income attributable to Common Stockholders - Diluted	$ 581,266	$ 490,344	$ 1,668,509	$ 1,673,380
Weighted Average Shares Outstanding — Basic and Diluted	361,764,112	361,234,111	361,640,742	362,584,302