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INCOME TAXES (Details) (USD $)
3 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
May 06, 2011
subsidiary
Jun. 30, 2012
GGP
Dec. 31, 2011
GGP
Oct. 20, 2011
GGP
subsidiary
May 06, 2011
GGP
Jun. 30, 2012
GGP
Maximum
Income taxes                  
Percentage of certain taxes indemnified by related party         93.75%        
Amount of certain taxes indemnified by related party                 $ 303,800,000
Amount of interest income receivable on the Tax Indemnity receivable         32,000,000 28,000,000      
Amount of combined deficiencies determined by the IRS sought to be overturned by the petition filed               144,100,000  
Number of former taxable REIT subsidiaries subject to litigation for which motion is filed to consolidate cases       2     2    
Non-cash loss on remeasurement of the Tax Indemnity receivable 8,782,000 8,782,000              
Unrecognized tax benefits, excluding interest 101,000,000 101,000,000 101,400,000            
Accrued interest related to unrecognized tax benefits 32,400,000 32,400,000 28,500,000            
Increase in interest expense related to unrecognized tax benefits $ 1,900,000 $ 3,900,000