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Equity Method Investments (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Aug. 29, 2014
Dec. 31, 2015
Jan. 22, 2015
Equity Method Investments (Details) [Line Items]        
Proceeds from Sale of Equity Method Investments $ (3,701,417)us-gaap_ProceedsFromSaleOfEquityMethodInvestments      
Applebees Indianapolis IN | AEI Net Lease Portfolio DST        
Equity Method Investments (Details) [Line Items]        
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal   Aug. 29, 2014    
Tractor Supply Starkville MS | AEI Net Lease Portfolio II DST        
Equity Method Investments (Details) [Line Items]        
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal       Jan. 22, 2015
Proceeds from Sale of Equity Method Investments     $ 1,833,000us-gaap_ProceedsFromSaleOfEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aei26_AEINetLeasePortfolioIIDSTMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= aei26_TractorSupplyStarkvilleMSMember
 
AEI Net Lease Portfolio DST        
Equity Method Investments (Details) [Line Items]        
Equity Method Investment, Ownership Percentage   28.30%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aei26_AEINetLeasePortfolioDSTMember
   
AEI Net Lease Portfolio II DST        
Equity Method Investments (Details) [Line Items]        
Equity Method Investment, Ownership Percentage       10.18%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aei26_AEINetLeasePortfolioIIDSTMember