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v3.25.0.1

Secured and Unsecured Debt of the Operating Partnership - Unsecured Senior Notes - Registered Offerings and Private Placement (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jan. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |
Principal amount of debt | $ 425,000,000 | $ 425,000,000 |  |  |
Repurchases of unsecured debt |  | 0 | $ 20,584,000 | $ 0 |
Repayments of unsecured debt | 403,700,000 | 723,712,000 | 0 | 0 |
Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repurchases of unsecured debt |  | 0 | 20,584,000 | 0 |
Repayments of unsecured debt |  | 723,712,000 | 0 | $ 0 |
Long-term debt, gross | 4,631,688,000 | 4,631,688,000 |  |  |
Kilroy Realty L.P. | Secured debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Net book value of properties pledged as collateral for secured debt | 795,300,000 | 795,300,000 |  |  |
Kilroy Realty L.P. | Unsecured debt | 3.450% Unsecured Senior Notes Due 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal amount of debt |  |  | 425,000,000 |  |
Repurchases of unsecured debt |  |  | $ 21,300,000 |  |
Stated interest rate |  |  | 3.45% |  |
Long-term debt, gross | $ 0 | $ 0 | $ 403,712,000 |  |
Stated coupon rate |  |  | 3.45% |  |
Kilroy Realty L.P. | Unsecured debt | 6.250% Unsecured Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal amount of debt |  |  |  |  | $ 400,000,000
Stated interest rate | 6.25% | 6.25% |  |  | 6.25%
Long-term debt, gross | $ 400,000,000 | $ 400,000,000 | $ 0 |  | $ 400,000,000.0
Unamortized discount (premium), net |  |  |  |  | $ 4,500,000
Stated coupon rate | 6.25% | 6.25% |  |  | 6.25%

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