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v3.24.3

Secured and Unsecured Debt of the Operating Partnership - Additional Information (Details) | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) debt_covenant | Mar. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) debt_covenant | Sep. 30, 2023 USD ($) | Jan. 31, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Repayments of unsecured debt (Note 5) |  |  | $ 320,000,000 | $ 0 |
Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt | $ 5,036,923,000 |  | 5,036,923,000 |  |
Repayments of unsecured debt (Note 5) |  |  | $ 320,000,000 | $ 0 |
Number of noncompliant debt covenants that could require immediate repayment of full principal balance of associated debt | debt_covenant | 1 |  | 1 |  |
6.250% Unsecured Senior Notes Due 2036 | Unsecured debt, net | Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt |  |  |  |  | $ 400,000,000.0
Initial issuance discount |  |  |  |  | $ 4,500,000
Stated interest rate on debt (percent) |  |  |  |  | 6.25%
Unsecured Term Loan Facility | Revolving credit facility | Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing facility, maximum borrowing capacity |  | $ 1,100,000,000 |  |  |
Unsecured Term Loan Facility | Term Loan Facility | Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing facility, maximum borrowing capacity |  | 520,000,000 |  |  |
Repayments of unsecured debt (Note 5) | $ 120,000,000 | 200,000,000 |  |  |
Unsecured New Term Loan Facility | Term Loan Facility | Kilroy Realty L.P. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unsecured senior note |  | 200,000,000 |  |  |
Borrowing facility, remaining borrowing capacity |  | $ 320,000,000 |  |  |
Borrowing facility, maturity date extension period |  | 12 months |  |  |

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