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Redeemable Noncontrolling Interests - Narrative (Details) - shares	1 Months Ended		6 Months Ended
	Jul. 30, 2024	Feb. 28, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2022
OP Units
Redeemable Noncontrolling Interests
Redemption of common limited partnership units to common shares			625,166	1,600,000
Subsequent Event
Redeemable Noncontrolling Interests
Redemption of common limited partnership units to common shares	100,972
JBG Smith, LP
Redeemable Noncontrolling Interests
Ownership interest by parent			86.40%
JBG Smith, LP | OP Units
Redeemable Noncontrolling Interests
Units outstanding			13,800,000
Ownership interest by parent			13.60%
Consolidated Real Estate Venture
Redeemable Noncontrolling Interests
Ownership interest by parent			100.00%		99.70%
Interest redeemed		0.30%

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- Definition

Common Shares Issued During Period in Connection with Redemption of OP Units

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- Definition

The percentage of entity's interest in net assets of the subsidiary redeemed expressed as a percentage

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

The number of units or equivalent units outstanding for all classes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

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