XML 71 R56.htm IDEA: XBRL DOCUMENT v3.21.2
Redeemable Noncontrolling Interests - Narrative (Details) - shares
1 Months Ended 6 Months Ended
Jul. 31, 2021
Jun. 30, 2021
Jun. 30, 2020
Consolidated Real Estate Venture      
Noncontrolling Interest [Line Items]      
Ownership interest by parent, threshold for capital contributions to cease   97.00%  
OP Units      
Noncontrolling Interest [Line Items]      
Conversion of common limited partnership units to common shares 99,838 648,752 942,940
JBG Smith, LP      
Noncontrolling Interest [Line Items]      
Ownership interest by parent   90.90%  
JBG Smith, LP | OP Units      
Noncontrolling Interest [Line Items]      
Units outstanding   13,200,000  
Ownership interest by parent   9.10%  
Consolidated Real Estate Venture      
Noncontrolling Interest [Line Items]      
Ownership interest by parent   96.00%