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Subsequent Events (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Feb. 09, 2024
USD ($)
ft²
Feb. 06, 2024
USD ($)
shares
Feb. 01, 2024
USD ($)
shares
Jan. 25, 2024
USD ($)
shares
Jan. 11, 2024
Jan. 08, 2024
USD ($)
ft²
Jun. 28, 2023
Jun. 27, 2023
USD ($)
Jun. 02, 2023
Apr. 21, 2023
ft²
Apr. 20, 2023
USD ($)
Aug. 13, 2023
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Feb. 02, 2024
shares
Subsequent Event [Line Items]                                
Repayments of Unsecured Debt                         $ 500,000 $ 0 $ 1,841,500  
Common stock, shares issued | shares                         157,019,766 156,836,767    
Proceeds from Secured Notes Payable                         $ 600,000 $ 0 $ 1,201,388  
3 Hudson Boulevard [Member] | Unconsolidated Properties                                
Subsequent Event [Line Items]                                
Ownership Percentage             25.00%                  
Number of extensions             1 2                
Debt               $ 80,000                
Debt Instrument, Basis Spread on Variable Rate             3.50% 3.50%                
3 Hudson Boulevard [Member] | Unconsolidated Properties | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                
Subsequent Event [Line Items]                                
Debt Instrument, Basis Spread on Variable Rate                       3.61%        
7750 Wisconsin Avenue [Member] | Unconsolidated Properties                                
Subsequent Event [Line Items]                                
Ownership Percentage                   50.00%            
Net Rentable Area (in sf) | ft²                   736,000            
Number of extensions                     2          
Debt Instrument, Basis Spread on Variable Rate                   1.25% 1.25%          
Construction Loan                     $ 252,600          
7750 Wisconsin Avenue [Member] | Unconsolidated Properties | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                
Subsequent Event [Line Items]                                
Debt Instrument, Basis Spread on Variable Rate                 1.35%              
Restricted Stock [Member]                                
Subsequent Event [Line Items]                                
Common stock, shares issued | shares                         73,762 41,818 57,383  
Boston Properties Limited Partnership                                
Subsequent Event [Line Items]                                
Repayments of Unsecured Debt                         $ 500,000 $ 0 $ 1,841,500  
Proceeds from Secured Notes Payable                         $ 600,000 $ 0 $ 1,201,388  
Boston Properties Limited Partnership | MYLTIP 2021                                
Subsequent Event [Line Items]                                
Number of shares issued | shares                             352,021  
Boston Properties Limited Partnership | LTIP Units [Member]                                
Subsequent Event [Line Items]                                
Number of shares issued | shares                         430,824 280,616 281,640  
Senior Notes | Boston Properties Limited Partnership                                
Subsequent Event [Line Items]                                
Debt                         $ 10,550,000      
Mortgages [Member]                                
Subsequent Event [Line Items]                                
Long-Term Debt                         $ 4,200,000      
3.916% unsecured senior notes | Senior Notes | Boston Properties Limited Partnership                                
Subsequent Event [Line Items]                                
Debt Instrument, Interest Rate, Stated Percentage [1]                         3.80%      
Debt [1]                         $ 700,000      
Subsequent Event [Member] | 3 Hudson Boulevard [Member] | Extended Maturity                                
Subsequent Event [Line Items]                                
Debt Instrument, Maturity Date   May 09, 2024                            
Subsequent Event [Member] | 3 Hudson Boulevard [Member] | Unconsolidated Properties                                
Subsequent Event [Line Items]                                
Ownership Percentage   25.00%                            
Debt   $ 80,000                            
Subsequent Event [Member] | 3 Hudson Boulevard [Member] | Unconsolidated Properties | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                
Subsequent Event [Line Items]                                
Debt Instrument, Basis Spread on Variable Rate   3.61%                            
Subsequent Event [Member] | 7750 Wisconsin Avenue [Member] | Extended Maturity                                
Subsequent Event [Line Items]                                
Debt Instrument, Maturity Date Apr. 26, 2025                              
Subsequent Event [Member] | 7750 Wisconsin Avenue [Member] | Unconsolidated Properties                                
Subsequent Event [Line Items]                                
Ownership Percentage 50.00%                              
Net Rentable Area (in sf) | ft² 736,000                              
Long-Term Debt $ 251,600                              
Construction Loan $ 252,600                              
Subsequent Event [Member] | 7750 Wisconsin Avenue [Member] | Unconsolidated Properties | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate                                
Subsequent Event [Line Items]                                
Debt Instrument, Basis Spread on Variable Rate 1.35%                              
Subsequent Event [Member] | 901 New York Avenue                                
Subsequent Event [Line Items]                                
Payments to Acquire Investments           $ 10,000                    
Net Rentable Area (in sf) | ft²           548,000                    
Subsequent Event [Member] | 901 New York Avenue | Joint Venture Partner [Member]                                
Subsequent Event [Line Items]                                
Ownership Percentage           50.00%                    
Subsequent Event [Member] | MYLTIP 2021                                
Subsequent Event [Line Items]                                
Final awards percentage of target     112.00%                          
Value of MYLTIP Awards     $ 12,600                          
Forfeitures, in units | shares     155,625                          
Subsequent Event [Member] | Restricted Stock [Member]                                
Subsequent Event [Line Items]                                
Common stock, shares issued | shares                               71,124
Subsequent Event [Member] | MYLTIP 2024                                
Subsequent Event [Line Items]                                
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award       The 2024 MYLTIP awards consists of three components. Two of the components, each weighted 40%, utilize BXP’s TSR over a three year measurement period as the performance metrics and the third component utilizes a leverage ratio as the performance metric.                        
Value of MYLTIP Awards       $ 11,100                        
Subsequent Event [Member] | Boston Properties Limited Partnership | LTIP Units [Member]                                
Subsequent Event [Line Items]                                
Number of shares issued | shares   429,237                            
Subsequent Event [Member] | Boston Properties Limited Partnership | MYLTIP 2024 | Minimum [Member]                                
Subsequent Event [Line Items]                                
Common stock available for issuance | shares       0                        
Subsequent Event [Member] | Boston Properties Limited Partnership | MYLTIP 2024 | Maximum [Member]                                
Subsequent Event [Line Items]                                
Common stock available for issuance | shares       330,479                        
Subsequent Event [Member] | Boston Properties Limited Partnership | MYLTIP 2024 | Target                                
Subsequent Event [Line Items]                                
Common stock available for issuance | shares       165,240                        
Subsequent Event [Member] | Mortgages [Member] | 901 New York Avenue                                
Subsequent Event [Line Items]                                
Long-Term Debt           $ 207,100                    
Debt Instrument, Interest Rate, Stated Percentage         3.61% 3.61%                    
Number of extensions         2                      
Subsequent Event [Member] | 3.916% unsecured senior notes | Senior Notes | Boston Properties Limited Partnership                                
Subsequent Event [Line Items]                                
Debt Instrument, Interest Rate, Stated Percentage     3.80%                          
Debt     $ 700,000                          
Repayments of Unsecured Debt     713,300                          
Debt Instrument, Increase, Accrued Interest     $ 13,300                          
[1] See Note 17.