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Noncontrolling Interests (Tables) | 12 Months Ended
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Dec. 31, 2025
Noncontrolling Interest [Line Items] |
Schedule of Noncontrolling Interest [Table Text Block] | Noncontrolling interests relate to the interests in BPLP not owned by BXP and interests in consolidated property partnerships not wholly-owned by the Company. As of December 31, 2025, the noncontrolling interests in BPLP consisted of the following:
OP Units |  | LTIP Units (1) |  | 2023 MYLTIP Units |  | 2024 MYLTIP Units |  | 2025 MYLTIP Units |  | 2025 OPP Units (2)
15,590,009 |  | 2,662,140 |  | 322,053 |  | 330,479 |  | 354,940 |  | 711,864
__________ (1)Includes 638,681 LTIP Units earned by employees under the Company’s multi-year long-term incentive awards granted between 2012 and 2022 (i.e., 2012 OPP and 2013 - 2022 MYLTIP awards). (2)See Note 15.
MYLTIP Performance Period Performance | The following table shows the results for the MYLTIP awards at the end of their respective three-year measurement period (Aggregate value is shown in millions):
|  | Measurement Date |  | Final Payout as a % of Target |  | Aggregate Value |  | Forfeited Units
2022 MYLTIP Awards |  | January 31, 2025 |  | 59 | % |  | $ | 5.4 |  |  | 177,919 |
2021 MYLTIP Awards |  | February 1, 2024 |  | 112 | % |  | $ | 12.6 |  |  | 155,625 |
2020 MYLTIP Awards |  | February 3, 2023 |  | 50 | % |  | $ | 3.8 |  |  | 152,460 |
Distribution Declared to OP, LTIP, OPP and MYLTIP Units [Table Text Block] | The following table presents BXP’s dividends per share and BPLP’s distributions per OP Unit and LTIP Unit paid or declared during the years ended December 31, 2025, 2024 and 2023:
Record Date |  | Payment Date |  | Dividend (Per Share) |  | Distribution (Per Unit)
December 31, 2025 |  | January 29, 2026 |  | $0.70 |  |  | $0.70 |
September 30, 2025 |  | October 31, 2025 |  | $0.70 |  |  | $0.70 |
June 30, 2025 |  | July 31, 2025 |  | $0.98 |  |  | $0.98 |
March 31, 2025 |  | April 30, 2025 |  | $0.98 |  |  | $0.98 |
December 31, 2024 |  | January 30, 2025 |  | $0.98 |  |  | $0.98 |
September 30, 2024 |  | October 31, 2024 |  | $0.98 |  |  | $0.98 |
June 28, 2024 |  | July 31, 2024 |  | $0.98 |  |  | $0.98 |
March 28, 2024 |  | April 30, 2024 |  | $0.98 |  |  | $0.98 |
December 29, 2023 |  | January 30, 2024 |  | $0.98 |  |  | $0.98 |
September 29, 2023 |  | October 31, 2023 |  | $0.98 |  |  | $0.98 |
June 30, 2023 |  | July 31, 2023 |  | $0.98 |  |  | $0.98 |
March 31, 2023 |  | April 28, 2023 |  | $0.98 |  |  | $0.98 |
December 30, 2022 |  | January 30, 2023 |  | $0.98 |  |  | $0.98 |
Noncontrolling Interests [Member] |
Noncontrolling Interest [Line Items] |
Distribution Declared to OP, LTIP, OPP and MYLTIP Units [Table Text Block] | The following table presents BPLP’s distributions on the OP Units, LTIP Units, MYLTIP Units and 2025 OPP Units paid or declared during the years ended December 31, 2025 and 2024 and 2023:
Record Date |  | Payment Date |  | Distributions per OP Unit and LTIP Unit |  | Distributions per MYLTIP Unit and 2025 OPP Units
December 31, 2025 |  | January 29, 2026 |  | $0.70 |  |  | $0.070 |
September 30, 2025 |  | October 31, 2025 |  | $0.70 |  |  | $0.070 |
June 30, 2025 |  | July 31, 2025 |  | $0.98 |  |  | $0.098 |
March 31, 2025 |  | April 30, 2025 |  | $0.98 |  |  | $0.098 |
December 31, 2024 |  | January 30, 2025 |  | $0.98 |  |  | $0.098 |
September 30, 2024 |  | October 31, 2024 |  | $0.98 |  |  | $0.098 |
June 28, 2024 |  | July 31, 2024 |  | $0.98 |  |  | $0.098 |
March 28, 2024 |  | April 30, 2024 |  | $0.98 |  |  | $0.098 |
December 29, 2023 |  | January 30, 2024 |  | $0.98 |  |  | $0.098 |
September 29, 2023 |  | October 31, 2023 |  | $0.98 |  |  | $0.098 |
June 30, 2023 |  | July 31, 2023 |  | $0.98 |  |  | $0.098 |
March 31, 2023 |  | April 28, 2023 |  | $0.98 |  |  | $0.098 |
December 30, 2022 |  | January 30, 2023 |  | $0.98 |  |  | $0.098 |

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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (e)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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