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Summary of Significant Accounting Policies - Reclassification Out Of AOCI, Simon Property Group, L.P. (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Significant Accounting Policies      
Total accumulated other comprehensive income (loss) $ (199,500) $ (175,100) $ (136,200)
Gain (loss) on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net 5,647 206,855 (114,960)
Interest expense (761,253) (795,712) (784,400)
Simon Property Group, L.P.      
Significant Accounting Policies      
Total accumulated other comprehensive income (loss) (228,300) (200,200) (155,800)
Gain (loss) on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net 5,647 206,855 (114,960)
Interest expense (761,253) (795,712) (784,400)
Currency translation adjustments. | Simon Property Group, L.P. | Amount reclassified from accumulated other comprehensive income (loss)      
Significant Accounting Policies      
Gain (loss) on acquisition of controlling interest, sale or disposal of, or recovery on, assets and interests in unconsolidated entities and impairment, net   5,660 (1,739)
Accumulated derivative gains (losses), net | Simon Property Group, L.P. | Amount reclassified from accumulated other comprehensive income (loss)      
Significant Accounting Policies      
Interest expense $ 1,595 $ 1,625 $ 1,845