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(Common Units) (Narrative) (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Feb. 01, 2024
USD ($)
shares
Jun. 30, 2024
USD ($)
yr
shares
Jun. 28, 2024
$ / shares
Dec. 31, 2023
USD ($)
Boston Properties Limited Partnership        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount | $   $ 1,230,848   $ 1,347,575
MYLTIP | Boston Properties Limited Partnership        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
Vesting Period   3 years    
Unvested MYLTIP Units [Member]        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
unvested MYLTIP distributions as compared to total distributions (percentage)   10.00%    
MYLTIP 2021        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
Final awards percentage of target 112.00%      
Value of MYLTIP Awards | $ $ 12,600      
Forfeitures, in units 155,625      
OP Units [Member]        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
OP Units for redemption (in shares)   76,906    
Restriction on redemption of OP Unit to Common Stock (in years) | yr   1    
Redemption of OP Unit equivalent to Common Stock (in shares)   1    
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount | $   $ 1,200,000    
Closing price of common stock (in dollars per share) | $ / shares     $ 61.56  
Vested 2012 OPP units and MYLTIPS        
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]        
OP Units for redemption (in shares)   56,489