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v3.23.2

Real Estate (Key Information for Leases) (Details) | 6 Months Ended
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Jun. 30, 2023 Property
Lessor, Lease, Description [Line Items] |
Weighted average remaining lease term | 10 years 2 months 12 days
Leases classified as operating leases | 3,492
Leases classified as direct financing leases | 5
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
Name: | nnn_LessorLeaseTermOfContract
Namespace Prefix: | nnn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Investment Properties leased under the direct financing method + References No definition available. + Details
Name: | nnn_NumberOfInvestmentPropertiesLeasedUnderDirectFinancingLeases
Namespace Prefix: | nnn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of Investment Properties leased under operating leases + References No definition available. + Details
Name: | nnn_NumberOfInvestmentPropertiesLeasedUnderOperatingLeases
Namespace Prefix: | nnn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted Average Remaining Lease Term + References No definition available. + Details
Name: | nnn_WeightedAverageRemainingLeaseTerm
Namespace Prefix: | nnn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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 No definition available. + Details
Name: | us-gaap_LessorLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |