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v3.23.3

Secured and Unsecured Debt of the Operating Partnership - Additional Information (Details) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Jul. 31, 2023 USD ($) ft² office_building apartment_unit | Mar. 31, 2023 USD ($) | Jan. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repurchases of unsecured debt |  | $ 14,290,000 | $ 0 |  |  |  |
Remaining principal balance | $ 4,330,326,000 | 4,330,326,000 |  |  |  |  | $ 4,020,058,000
Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term loan facility, accordion feature for additional term loan commitments |  |  |  |  |  | $ 100,000,000 |
Term loan facility, maximum borrowing capacity |  |  |  |  |  | $ 650,000,000 |
Term loan facility, additional borrowing capacity |  |  |  |  | $ 20,000,000 |  |
Unsecured debt, net |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Remaining principal balance | 410,700,000 | 410,700,000 |  |  |  |  |
Unsecured debt, net | 3.45% Unsecured Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured senior note | 425,000,000 | $ 425,000,000 |  |  |  |  |
Repurchases of unsecured debt | $ 14,300,000 |  |  |  |  |  |
Stated interest rate on debt (percent) | 3.45% | 3.45% |  |  |  |  |
Kilroy Realty L.P. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Remaining principal balance | $ 4,330,326,000 | $ 4,330,326,000 |  |  |  |  | 4,020,058,000
Kilroy Realty L.P. | Revolving credit facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term loan facility, maximum borrowing capacity | 1,100,000,000 | 1,100,000,000 |  |  |  |  | 1,100,000,000
Kilroy Realty L.P. | Term Loan Facility | Unsecured Term Loan Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term loan facility, maximum borrowing capacity | 520,000,000 | 520,000,000 |  |  |  |  | $ 400,000,000
Kilroy Realty L.P. | Mortgages | Secured Mortgage Loan Transaction |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long term debt |  |  |  | $ 375,000,000 |  |  |
Number of office buildings | office_building |  |  |  | 2 |  |  |
Number of apartment units | apartment_unit |  |  |  | 608 |  |  |
Square feet of retail space | ft² |  |  |  | 95,000 |  |  |
Percentage bearing fixed interest rate |  |  |  | 5.90% |  |  |
Kilroy Realty L.P. | Unsecured debt, net | Unsecured Term Loan Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long term debt | $ 520,000,000 | $ 520,000,000 |  |  |  |  |

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