Organization: (Details)	12 Months Ended
	Dec. 31, 2014 entity	Dec. 31, 2013
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of management companies (in entities)	7
The Macerich Partnership, L.P.
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ownership interest in operating partnership (as a percent)	94.00%	93.00%