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Organization (Details)
Dec. 31, 2025
ft²
Real_Estate_Properties
yr
shares
Dec. 31, 2024
Real Estate Properties [Line Items]    
Restriction on redemption of OP units from date of issuance (years) | yr 1  
One OP unit is equivalent to one share of Common Stock (in shares) | shares 1  
OP unit conversion rate (in shares) | shares 1  
LTIP Unit Conversion Rate | shares 1  
Number of VIEs 11  
Unconsolidated Joint Ventures [Member]    
Real Estate Properties [Line Items]    
Number of VIEs 3  
Variable Interest Entity, Primary Beneficiary [Member]    
Real Estate Properties [Line Items]    
Number of VIEs 8  
Variable Interest Entity, Primary Beneficiary [Member] | Commercial Real Estate Properties [Member]    
Real Estate Properties [Line Items]    
Number of VIEs 6  
Construction in Progress    
Real Estate Properties [Line Items]    
Number of real estate properties 8  
Net Rentable Area (in sf) | ft² 3,500,000  
Commercial Real Estate Properties [Member]    
Real Estate Properties [Line Items]    
Number of real estate properties 179  
Net Rentable Area (in sf) | ft² 52,600,000  
Office Building [Member]    
Real Estate Properties [Line Items]    
Number of real estate properties 157  
Net Rentable Area (in sf) | ft² 409,200  
Office Building [Member] | Construction in Progress    
Real Estate Properties [Line Items]    
Number of real estate properties 4  
Retail Site [Member]    
Real Estate Properties [Line Items]    
Number of real estate properties 14  
Retail Site [Member] | Construction in Progress    
Real Estate Properties [Line Items]    
Number of real estate properties 1  
Residential Building    
Real Estate Properties [Line Items]    
Number of real estate properties 7  
Net Rentable Area (in sf) | ft² 684,500  
Residential Building | Construction in Progress    
Real Estate Properties [Line Items]    
Number of real estate properties 3  
Hotel [Member]    
Real Estate Properties [Line Items]    
Number of real estate properties 1  
Boston Properties Limited Partnership    
Real Estate Properties [Line Items]    
General and limited partnership interest in the operating partnership (percent) 89.70% 89.70%