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Organization (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 19, 2007
Mar. 15, 2005
Limited Member [Member]          
Organization (Details) [Line Items]          
Capital Units, Value         $ 10us-gaap_CapitalUnits
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember
Limited Partners' Capital Account, Units Outstanding (in Shares) 1,771,596.5us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember		 1,780,725.0us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember		 1,792,925.0us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember		 1,832,736us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember		 150,000us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember
Limited Partners' Contributed Capital       18,327,360us-gaap_LimitedPartnersContributedCapital
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember		 1,500,000us-gaap_LimitedPartnersContributedCapital
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_LimitedMemberMember
Managing Member [Member]          
Organization (Details) [Line Items]          
General Partners' Contributed Capital       $ 1,000us-gaap_GeneralPartnersContributedCapital
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= aei26_ManagingMemberMember