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Stock Option and Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2025

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity

Information for the Common Stock issues under the Stock Purchase Plan during the years ended December 31, 2025, 2024 and 2023 is as follows:

						2025						2024						2023
Shares issued						13,302						17,237						18,552
Weighted average price per share						$	61.67					$	56.28					$	51.93

2020-2022 Vested MYLTIPs [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

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

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest

The following table shows information for restricted stock that were issued by BXP during the years ended December 31, 2025, 2024 and 2023 (Issued value is shown in millions):

Restricted Stock						2025						2024						2023
Shares issued						56,273						83,316						73,762
Issued value						$	4.1					$	5.3					$	5.4
Weighted-average price per share						$	72.37					$	63.28					$	72.57

LTIP Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest

The following table shows information for LTIP units that were issued by BPLP during the years ended December 31, 2025, 2024 and 2023 (Issued value is shown in millions):

LTIP Units						2025						2024						2023
Units Issued						406,646						451,044						430,824
Issued value						$	26.9					$	26.8					$	29.9
Weighted-average price per unit						$	66.10					$	59.41					$	69.29
Monte Carlo assumptions (1):
Expected life (in years)						5.7						5.7						5.7
Risk free interest rate						4.45		%				4.03		%				3.67		%
Expected price volatility						38.0		%				36.0		%				32.0		%

_______________

(1)LTIP Units were valued using a Monte Carlo simulation method model in accordance with the provisions of ASC 718.

MYLTIP

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest

The following table shows information for MYLTIP Units that were issued by BPLP during the years ended December 31, 2025, 2024 and 2023:

MYLTIP Units						2025						2024						2023
Units Issued						354,940						330,479						322,053

2025 OPP

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Shared-based Compensation Arrangement by Share-based Payment Award, Performance requirement

At a Dividend-Adjusted Stock Price Performance equal to or greater than $90.00, an approximately 30% increase from the closing stock price on the Grant Date, the LTIP Units will be earned as follows (subject to the additional service-based vesting requirements described below):

Performance Tier						Dividend-Adjusted Stock Price Performance						Percentage of Award Earned
Eight						$118.00						100.0%
Seven						$114.00						87.5%
Six						$110.00						75.0%
Five						$106.00						62.5%
Four						$102.00						50.0%
Three						$98.00						37.5%
Two						$94.00						25.0%
One						$90.00						12.5%

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