Basis of Presentation and Consolidation (Details) - property	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties
Total number of joint venture properties	82	81
Number of joint venture properties managed by the entity	57
Number of International joint venture properties	21
Number of joint venture properties managed by others	25
Simon Property Group, L.P.
Ownership interest:
Ownership interest in the Operating Partnership (as a percent)	86.80%	86.80%
Simon Property Group, L.P. | Weighted average
Ownership interest:
Ownership interest in the Operating Partnership (as a percent)	86.80%	86.80%	86.80%
Wholly owned properties
Real Estate Properties
Number of properties	133
Partially owned properties
Real Estate Properties
Number of properties	18