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Subsequent Events - Additional Information (Detail)
6 Months Ended
Jul. 01, 2018
USD ($)
ShoppingCenter
shares
Jun. 30, 2018
USD ($)
Jul. 02, 2018
USD ($)
Jun. 26, 2018
Dec. 31, 2017
USD ($)
Subsequent Event [Line Items]          
Mortgage indebtedness   $ 1,428,025,000     $ 641,082,000
Unsecured Debt [Member] | Revolving Credit Facility [Member] | PNC Bank National Association [Member]          
Subsequent Event [Line Items]          
Unsecured revolving credit facility   50,000,000      
Subsequent Event [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] | PNC Bank National Association [Member]          
Subsequent Event [Line Items]          
Unsecured revolving credit facility     $ 20,000,000    
U.S. [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Number of shopping centers in connection with spinoff | ShoppingCenter 36        
Puerto Rico [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Number of shopping centers in connection with spinoff | ShoppingCenter 12        
Retail Value Inc. [Member]          
Subsequent Event [Line Items]          
Gross asset value   $ 2,700,000,000      
Percentage of distribution of outstanding common shares rights to holders       100.00%  
Spin off distribution description   On the spin-off date, holders of DDR’s common shares received one common share of RVI for every ten shares of DDR common stock held on the record date.      
Preferred stock, value   $ 190,000,000      
Retail Value Inc. [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Number of shopping centers in connection with spinoff | ShoppingCenter 48        
Gross asset value $ 2,700,000,000        
Mortgage indebtedness $ 1,270,000,000        
Retail Value Inc. [Member] | Subsequent Event [Member] | Unsecured Debt [Member] | Revolving Credit Facility [Member] | PNC Bank National Association [Member]          
Subsequent Event [Line Items]          
Unsecured revolving credit facility     $ 30,000,000    
Retail Value Inc. [Member] | Subsequent Event [Member] | Series A Preferred Stock [Member]          
Subsequent Event [Line Items]          
Cumulative redeemable preferred shares, shares issued | shares 1,000        
Preferred stock, value $ 190,000,000        
Maximum increase in preferred stock amount $ 10,000,000        
Retail Value Inc. [Member] | U.S. [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Number of shopping centers in connection with spinoff | ShoppingCenter 36        
Retail Value Inc. [Member] | Puerto Rico [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Number of shopping centers in connection with spinoff | ShoppingCenter 12