XML 120 R104.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income Taxes - Reconciliation of GAAP Net Loss Attributable to Taxable Income (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Percentage of taxable income dividend rate | 90.00%

X
- Definition Percentage of distributed taxable income to qualify as REIT. + References No definition available. + Details
Name: | ddr_PercentageOfDistributedTaxableIncomeToQualifyAsREIT
Namespace Prefix: | ddr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration