Document And Entity Information (USD $)	9 Months Ended
	Sep. 30, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	AEI Income & Growth Fund 26 LLC
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding	1,813,931
Entity Public Float	$ 0
Amendment Flag	false
Entity Central Index Key	0001326321
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3