Statement of Financial Position [Abstract] Cash Cash, beginning of year Cash, end of year Land Buildings Acquired Intangible Lease Assets Cost Real Estate Held for Investment, at cost Accumulated Depreciation and Amortization Real Estate Held for Investment, Net Total Assets Payable to AEI Fund Management, Inc. Distributions Payable Total Current Liabilities Acquired Below-Market Lease Intangibles, Net Cost Managing Members Limited Members – 10,000,000 Units authorized; 1,738,006 and 1,744,006 Units issued and outstanding as of December 31, 2017 and 2016, respectively Related Party [Axis] Limited Partner [Member] Limited Members, units authorized Limited Members, units issued Limited Members, units outstanding Balance (in Shares) Balance (in Shares) Limited Partners' Capital Account, Units Outstanding (in Shares) Total Members’ Equity Balance Balance Total Liabilities and Members’ Equity Income Statement [Abstract] Rental Income Depreciation and Amortization Total Expenses Operating Income (Loss) Interest Income Net Income Net Income for Financial Reporting Purposes Net Income Limited Members Net Income per LLC Unit (in Dollars per share) Weighted Average Units Outstanding – Basic and Diluted (in Shares) Statement of Cash Flows [Abstract] (Increase) Decrease in Receivables Increase (Decrease) in Payable to AEI Fund Management, Inc. Total Adjustments Net Cash Provided By (Used For) Operating Activities Investments in Real Estate Payments to Acquire Real Estate Distributions Paid to Members Repurchase of LLC Units Net Cash Provided By (Used For) Financing Activities Net Increase (Decrease) in Cash Statement of Partners' Capital [Abstract] Distributions Declared Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared Repurchase of LLC Units Partners' Capital Account, Redemptions Units Repurchased (in Shares) Partners' Capital Account, Units, Redeemed (in Shares) Managing Member [Member] Limited Member [Member] Accounting Policies [Abstract] Related Party Transactions [Abstract] AEI is reimbursed for costs incurred in providing services related to managing the Company’s operations and properties, maintaining the Company’s books, and communicating with the Limited Members. LLC Administration – Affiliates AEI is reimbursed for all direct expenses it paid on the Company’s behalf to third parties related to Company administration and property management. These expenses included printing costs, legal and filing fees, direct administrative costs, outside audit costs, taxes, insurance and other property costs. LLC Administration and Property Management – Unrelated Parties AEI is reimbursed for costs incurred in providing services and direct expenses related to the acquisition of properties on behalf of the Company. Property Acquisition Real Estate [Abstract] Real Estate Held for Investment [Abstract] Name of Property [Axis] Biomat USA Plasma Center Wichita KS Total Accumulated Depreciation Advance Auto Parts Middletown OH Applebees Crawfordsville IN Cellular Connection Bluffton IN Best Buy Eau Claire WI Dicks Sporting Goods Fredericksburg VA Fresenius Medical Center Chicago IL Zales Enid OK Dollar Tree West Point MS Acquired Lease Intangibles [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Leases, Acquired-in-Place [Member] Cost Finite-Lived Intangible Asset, Acquired-in-Place Leases Accumulated Amortization Weighted average life Above Market Leases [Member] Off Market Unfavorable Lease Member Lease Intangibles Accumulated Amortization Future Minimum Rent [Abstract] 2018 2019 2020 2021 2022 Thereafter Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Major Tenants [Abstract] Customer [Axis] Dicks Sporting Goods Inc Major Tenants Best Buy Stores LP Dollar Tree Stores Inc Apple Indiana II LLC Zales Delaware Inc Aggregate rental income of major tenants as a percentage of total rental income Partners' Capital Notes [Abstract] Income Tax Disclosure [Abstract] Federal Taxable Income Reconciliation [Abstract] Depreciation for Tax Purposes Under Depreciation and Amortization for Financial Reporting Purposes Income Accrued for Tax Purposes Over (Under) Income for Financial Reporting Purposes Acquisition Costs Expensed for Financial Reporting Purposes, Capitalized for Tax Purposes Taxable Income to Members Federal Tax Partners' Capital [Abstract] Members’ Equity for Financial Reporting Purposes Adjusted Tax Basis of Investments in Real Estate Over Net Investments in Real Estate for Financial Reporting Purposes Income Accrued for Tax Purposes Over Income for Financial Reporting Purposes Syndication Costs Treated as Reduction of Capital For Financial Reporting Purposes Members’ Equity for Tax Reporting Purposes Current Assets: Real Estate Investments: Current Liabilities: Long-term Liabilities: Members’ Equity (Deficit): Expenses: Other Income: Net Income Allocated: Managing Members Cash Flows from Operating Activities: Adjustments to Reconcile Net Income To Net Cash Provided by Operating Activities: Depreciation and Amortization Cash Flows from Investing Activities: Cash Flows from Financing Activities: Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Related Party Transactions Disclosure [Text Block] Schedule of Related Party Transactions [Table Text Block] Real Estate Disclosure [Text Block] Property, Plant and Equipment [Table Text Block] Land Buildings Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Cost Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross Accumulated Amortization Accumulated Amortization Accumulated Amortization Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Segment Reporting, Disclosure of Major Customers Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Partners' Capital Notes Disclosure [Text Block] Income Tax Disclosure [Text Block] Schedule Of GAAP To Federal Taxable Income Schedule Of GAAP To Federal Tax Basis Business Acquisition [Axis] Capital Units, Value Limited Partners' Contributed Capital General Partners' Contributed Capital Payments for Tenant Improvements Depreciation, Nonproduction Business Acquisition, Effective Date of Acquisition Business Acquisition, Transaction Costs Average Lease Term Real Estate Revenue, Net Amortization of Intangible Assets Amortization of above and below Market Leases Amortization of Below Market Lease Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Assets, Amortization Expense, Year Two Below Market Lease, Amortization Income, Next Twelve Months DistributionsPerUnitOfNetIncome (in Dollars per Item) Cost of Property Repairs and Maintenance Payments for Lease Commissions Distributions Per Limited Partnership Unit Outstanding, Basic (in Dollars per share) Weighted Average Limited Partnership Units Outstanding, Basic (in Shares) DistributionsPerUnitOfReturnOfCapital (in Dollars per Item) SaleProceedsDistributionMadeToMemberOrLimitedPartner SaleProceedsDistributionMadetomLimitedMemberPerUnit Distribution Policy, Members or Limited Partners, Description Key Provisions of Operating or Partnership Agreement, Description Basis of Accounting, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Receivables, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Revenue Recognition, Leases [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Related Party [Domain] Name of Property [Domain] Property, Plant and Equipment [Table] Property, Plant and Equipment [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Acquired Finite-Lived Intangible Assets [Line Items] Customer [Domain] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Revenue, Major Customer [Line Items] Organization (Details) [Table] Organization (Details) [Line Items] Business Acquisition, Acquiree [Domain] Real Estate Investments (Details) [Table] Real Estate Investments (Details) [Line Items] Members' Capital (Details) [Table] Members' Capital (Details) [Line Items] Distribution of sales proceeds declared or paid to a common shareholder or unit-holder by LLC or LP. Advance Auto Parts Middletown OH [Member] Apple Indiana IILLC [Member] Applebees Crawfordsville IN [Member] Best Buy Eau Claire WI [Member] Best Buy Stores LP [Member] Biomat USA Plasma Center Wichita KS [Member] Cellular Connection Bluffton IN [Member] Dicks Sporting Goods Fredericksburg VA [Member] Dicks Sporting Goods Inc [Member] Dollar Tree Stores Inc [Member] Dollar Tree West Point MS [Member] Fresenius Medical Center Chicago IL [Member] Lease Intangibles Accumulated Amortization [Member] Limited Member [Member] A party to a limited liability company who has limited liability and is not active in the day-to-day operations of the company. Managing Member [Member] A party to a limited liability company who is also the managing partner, which means this person is active in the day-to-day operations of the partnership. Off Market Unfavorable Lease [Member] Sports Authority Wichita KS [Member] Zales Delaware Inc [Member] Zales Enid OK [Member] tractorsupplystarkville [Member] Document and Entity Information [Abstract] FiniteLivedIntangibleAssetsAccumulatedAmortizationBelowMarket MembersEquityForTaxReportingPurposes FiniteLivedIntangibleAssetsAccumulatedAmortizationAboveMarket TaxableIncomeToMembers Liabilities and Equity Entity Central Index Key Amendment Flag Liabilities, Current Entity Public Float Document Period End Date Investment Building and Building Improvements Cash and Cash Equivalents, Period Increase (Decrease) Entity Registrant Name Trading Symbol Operating Leases, Future Minimum Payments Receivable Net Income (Loss) Allocated to General Partners Payments for Repurchase of Redeemable Noncontrolling Interest Real Estate Investment Property, Net Payments of Capital Distribution Net Cash Provided by (Used in) Financing Activities Real Estate Investment Property, Accumulated Depreciation Net Cash Provided by (Used in) Operating Activities Document Fiscal Period Focus Entity Current Reporting Status Document Type Operating Expenses Document Fiscal Year Focus Partners' Capital Operating Income (Loss) Finite-Lived Intangible Assets, Accumulated Amortization Increase (Decrease) in Receivables Entity Common Stock, Shares Outstanding Other Depreciation and Amortization Current Fiscal Year End Date Land and Land Improvements Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Entity Voluntary Filers Entity Filer Category Real Estate Investment Property, at Cost Assets Entity Well-known Seasoned Issuer Amendment Description Statement [Table] Statement [Line Items] Scenario [Axis]