Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2021 USD ($) property segment tenant shares	Dec. 31, 2020 USD ($) property
Accounting Policies [Line Items]
Outstanding units \| shares	69,257,992
Number of real estate properties held-for-sale \| property	1	1
Cash in excess of FDIC insured amounts	$ 187.4	$ 7.0
Straight-line rent receivables	$ 35.1	29.8
Number of tenants for whom, collections no longer probable \| tenant	4
Number of Reportable Segments \| segment	1
Covid-19 [Member]
Accounting Policies [Line Items]
Deferred Rent Receivables, Net	$ 0.9
Unbilled Revenues [Member]
Accounting Policies [Line Items]
Accounts Receivable, Gross	$ 6.8	$ 4.1
Building [Member]
Accounting Policies [Line Items]
Useful life	40 years
Building Improvements [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Useful life	10 years
Building Improvements [Member] \| Maximum [Member]
Accounting Policies [Line Items]
Useful life	20 years
Agree Realty Corporation [Member] \| General Partner [Member]
Accounting Policies [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	99.50%	99.40%
Agree Realty Corporation [Member] \| Third party [Member]
Accounting Policies [Line Items]
Non controlling interest	0.50%	0.60%

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Lessor, Operating Lease, Assumptions and Judgments, Number Of Tenants, Collections No Longer Probable

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