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Real Estate (Key Information for Leases) (Details)	9 Months Ended
	Sep. 30, 2024 Property
Lessor, Lease, Description [Line Items]
Weighted average remaining lease term (years)	10 years
Leases classified as operating leases	3,541
Leases classified as direct financing leases	4
Minimum
Lessor, Lease, Description [Line Items]
Initial lease term	10 years
Maximum
Lessor, Lease, Description [Line Items]
Initial lease term	20 years

X

- Definition

Lessor, Lease, Term Of Contract

+ References

No definition available.

+ Details

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X

- Definition

Number of Investment Properties leased under the direct financing method

+ References

No definition available.

+ Details

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X

- Definition

Total number of Investment Properties leased under operating leases

+ References

No definition available.

+ Details

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Namespace Prefix:	nnn_
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X

- Definition

Weighted Average Remaining Lease Term

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-3

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- Details

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