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INCOME TAXES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Dec. 31, 2012
May 06, 2011
item
Sep. 30, 2013
GGP
Dec. 31, 2012
GGP
Oct. 20, 2011
GGP
item
May 06, 2011
GGP
Sep. 30, 2013
GGP
Maximum
Income taxes                  
Percentage of certain taxes indemnified by related party         93.75%        
Amount of certain taxes indemnified by related party                 $ 303.8
Amount of interest income receivable on the Tax Indemnity receivable         42.1 36.4      
Increase in tax indemnity receivable 2.5                
Reduction in the tax indemnity receivable due to interest income that was offset by the utilization of tax assets   3.1              
Increase in tax indemnity receivable due to the increase in the related interest income 1.8                
Increase in tax indemnity receivable due to the increase in the remeasurement gain 0.7                
Amount of combined deficiencies determined by the IRS sought to be overturned by the petition filed               144.1  
Number of former taxable REIT subsidiaries subject to litigation for which motion is filed to consolidate cases       2     2    
Unrecognized tax benefits, excluding interest 95.1 95.1 95.9            
Accrued interest related to unrecognized tax benefits 42.2 42.2 36.6            
Interest expense related to unrecognized tax benefits $ 1.7 $ 5.6