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Stock Option and Incentive Plan Stock and Units (Narrative) (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 01, 2024 USD ($) shares | Jan. 25, 2024 USD ($) shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) $ / shares shares | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares issued |  |  |  | 157,176,741 |  | 157,176,741 |  | 157,019,766
Stock based compensation expense | $ |  |  |  | $ 16,000 | $ 14,900 | $ 34,500 | $ 40,900 |
Common Stock, Value, Issued | $ |  |  |  | $ 1,571 |  | $ 1,571 |  | $ 1,569
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares issued |  |  |  | 83,316 |  | 83,316 |  |
LTIP Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Value Of LTIP Units Issued | $ |  |  |  |  |  | $ 26,600 |  |
MYLTIP 2024 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Value of MYLTIP Awards | $ |  |  | $ 11,100 |  |  |  |  |
MYLTIP 2021 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Final awards percentage of target |  | 112.00% |  |  |  |  |  |
Value of MYLTIP Awards | $ |  | $ 12,600 |  |  |  |  |  |
Forfeitures, in units |  | 155,625 |  |  |  |  |  |
Unvested Restricted stock and LTIP Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting |  |  |  |  |  | 4 |  |
Boston Properties Limited Partnership | LTIP Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares issued |  |  |  |  |  | 449,550 |  |
Noncontrolling Interest, Outstanding | [1] |  |  | 2,681,580 |  | 2,681,580 |  |
Boston Properties Limited Partnership | MYLTIP 2024 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Outstanding |  |  |  | 330,479 |  | 330,479 |  |
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. |  |  |  |  |
Boston Properties Limited Partnership | MYLTIP 2024 | Maximum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock available for issuance |  |  | 330,479 |  |  |  |  |
Boston Properties Limited Partnership | MYLTIP 2024 | Minimum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock available for issuance |  |  | 0 |  |  |  |  |
Boston Properties Limited Partnership | MYLTIP 2024 | Target |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock available for issuance |  |  | 165,240 |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Employee and director payment per share (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.01 |  |
Common Stock, Value, Issued | $ |  |  |  | $ 5,300 |  | $ 5,300 |  |
Ltips (including vested MYLTIPS) And Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expenses | $ |  |  |  | 28,900 |  | 28,900 |  |
Unvested MYLTIP Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expenses | $ |  |  |  | $ 100 |  | $ 100 |  |
Weighted-average period (years) |  |  |  |  |  | 2 years 8 months 12 days |  |
LTIP and MYLTIP Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Employee and director payment per share (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.25 |  |
[1] | Includes 666,405 LTIP Units earned by employees under the Company’s multi-year long-term incentive awards granted between 2012 and 2021 (i.e., 2012 OPP and 2013 - 2021 MYLTIP awards).

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