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INCOME TAXES (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Oct. 20, 2011
item
May 06, 2011
Income taxes        
Number of former taxable REIT subsidiaries subject to litigation for which motion is filed to consolidate cases       2
Reduction in tax indemnity receivable $ 1,904,000      
Unrecognized tax benefits, excluding interest 95,900,000 95,900,000    
Accrued interest related to unrecognized tax benefits 38,700,000 36,600,000    
Increase in interest expense related to unrecognized tax benefits 2,100,000      
GGP
       
Income taxes        
Percentage of certain taxes indemnified by related party 93.75%      
Amount of interest income receivable on the Tax Indemnity receivable 38,400,000 36,400,000    
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  
GGP | Maximum
       
Income taxes        
Amount of certain taxes indemnified by related party $ 303,800,000