v3.25.2
Unsecured Senior Notes (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jan. 15, 2025
Jun. 30, 2025
Jun. 30, 2024
Aug. 26, 2024
Debt Instrument [Line Items]        
Repayments of Unsecured Debt   $ 850,000 $ 700,000  
Boston Properties Limited Partnership        
Debt Instrument [Line Items]        
Repayments of Unsecured Debt   $ 850,000 $ 700,000  
3.350% unsecured senior notes | Senior Notes | Boston Properties Limited Partnership        
Debt Instrument [Line Items]        
Debt $ 850,000      
Debt Instrument, Interest Rate, Stated Percentage 3.20%      
Repayments of Unsecured Debt $ 863,600      
Debt Instrument, Increase, Accrued Interest $ 13,600      
5.842% unsecured senior notes | Senior Notes | Boston Properties Limited Partnership        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage       5.75%