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Real Estate (Key Information for Leases) (Details)	12 Months Ended
	Dec. 31, 2024 Property
Lease classification:
Operating	3,533
Direct financing	4
Weighted average remaining lease term (years)	10 years
Minimum
Lease classification:
Initial lease terms	10 years
Maximum
Lease classification:
Initial lease terms	20 years

X

- Definition

Lessor, Lease, Term Of Contract

+ References

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+ Details

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Period Type:	duration

X

- Definition

Number of Investment Properties leased under the direct financing method

+ References

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+ Details

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Namespace Prefix:	nnn_
Data Type:	xbrli:integerItemType
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Period Type:	instant

X

- Definition

Total number of Investment Properties leased under operating leases

+ References

No definition available.

+ Details

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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

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Namespace Prefix:	nnn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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- Details

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