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Secured and Unsecured Debt of the Operating Partnership - Debt Maturities (Details) - Kilroy Realty L.P. $ in Thousands	Dec. 31, 2024 USD ($)
Stated debt maturities and scheduled amortization payments, excluding debt discounts
2025	$ 606,246
2026	401,317
2027	249,125
2028	400,000
2029	475,000
Thereafter	2,500,000
Total aggregate principal value	4,631,688
Unsecured Term Loan Facility
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Unamortized debt issuance expense	25,500
Unsecured Senior Notes
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Unamortized discount	$ 8,400

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