Kilroy Realty (KRC) 10-Q 1 Aug 23 2023 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2023	Jul. 28, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	1-12675
Entity Registrant Name	KILROY REALTY CORPORATION
Entity Incorporation, State Code	MD
Entity Tax Identification Number	95-4598246
Entity Address, Address Line One	12200 W. Olympic Boulevard
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90064
City Area Code	310
Local Phone Number	481-8400
Title of 12(b) Security	Common Stock, $.01 par value
Security Exchange Name	NYSE
Trading Symbol	KRC
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		117,177,908
Entity Central Index Key	0001025996
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false
Kilroy Realty L.P.
Entity Information [Line Items]
Entity File Number	000-54005
Entity Registrant Name	KILROY REALTY, L.P.
Entity Incorporation, State Code	DE
Entity Tax Identification Number	95-4612685
Title of 12(g) Security	Common Units Representing Limited Partnership Interests
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001493976
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
REAL ESTATE ASSETS:
Land and improvements	$ 1,738,242	$ 1,738,242
Buildings and improvements	8,353,596	8,302,081
Undeveloped land and construction in progress	1,894,545	1,691,860
Total real estate assets held for investment	11,986,383	11,732,183
Accumulated depreciation and amortization	(2,369,515)	(2,218,710)
Total real estate assets held for investment, net	9,616,868	9,513,473
CASH AND CASH EQUIVALENTS	361,885	347,379
MARKETABLE SECURITIES (Note 8)	25,786	23,547
CURRENT RECEIVABLES, NET	10,686	20,583
DEFERRED RENT RECEIVABLES, NET	463,640	452,200
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET	230,559	250,846
RIGHT OF USE GROUND LEASE ASSETS	126,022	126,530
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 2)	75,588	62,429
TOTAL ASSETS	10,911,034	10,796,987
LIABILITIES:
Secured debt, net (Notes 3 and 8)	240,142	242,938
Unsecured debt, net (Notes 3 and 8)	4,172,833	4,020,058
Accounts payable, accrued expenses and other liabilities	377,733	392,360
Ground lease liabilities	124,678	124,994
Accrued dividends and distributions (Note 13)	64,438	64,285
Deferred revenue and acquisition-related intangible liabilities, net	185,429	195,959
Rents received in advance and tenant security deposits	78,187	81,432
Total liabilities	5,243,440	5,122,026
COMMITMENTS AND CONTINGENCIES (Note 7)
Stockholders’ Equity:
Common stock, $.01 par value, 280,000,000 shares authorized, 117,177,908 and 116,878,031 shares issued and outstanding	1,172	1,169
Additional paid-in capital	5,184,227	5,170,760
Retained earnings	248,695	265,118
Total stockholders’ equity	5,434,094	5,437,047
Noncontrolling Interests (Notes 1 and 4):
Common units of the Operating Partnership	53,358	53,524
Noncontrolling interests in consolidated property partnerships	180,142	184,390
Total noncontrolling interests	233,500	237,914
Total equity	5,667,594	5,674,961
TOTAL LIABILITIES AND EQUITY (CAPITAL)	$ 10,911,034	$ 10,796,987

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	280,000,000	280,000,000
Common stock, issued (in shares)	117,177,908	116,878,031
Common stock, outstanding (in shares)	117,177,908	116,878,031

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 6)	$ 281,309	$ 268,576	$ 571,413	$ 531,784
Other property income	2,973	2,608	5,671	4,901
Total revenues	284,282	271,184	577,084	536,685
EXPENSES
Property expenses	55,008	49,922	108,788	95,346
Real estate taxes	28,277	25,433	56,505	51,303
Ground leases	2,413	1,876	4,782	3,702
General and administrative expenses (Note 5)	22,659	22,120	46,595	44,901
Leasing costs	1,326	1,447	2,698	2,460
Depreciation and amortization	90,362	96,415	184,038	185,075
Total expenses	200,045	197,213	403,406	382,787
OTHER INCOME (EXPENSES)
Interest and other income, net	3,421	125	4,881	206
Interest expense (Note 3)	(26,383)	(20,121)	(52,054)	(40,746)
Total other expenses	(22,962)	(19,996)	(47,173)	(40,540)
NET INCOME	61,275	53,975	126,505	113,358
Net income attributable to noncontrolling common units of the Operating Partnership	(537)	(515)	(1,097)	(1,031)
Net income attributable to noncontrolling interests in consolidated property partnerships	(5,151)	(6,355)	(13,213)	(12,094)
Total income attributable to noncontrolling interests	(5,688)	(6,870)	(14,310)	(13,125)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 55,587	$ 47,105	$ 112,195	$ 100,233
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Weighted average common shares outstanding – basic (in shares)	117,154,946	116,822,234	117,107,402	116,736,706
Weighted average common shares outstanding – diluted (in shares)	117,359,517	117,184,938	117,382,783	117,122,861

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Stock- holders’ Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2021			116,464,169
Beginning balance at Dec. 31, 2021	$ 5,689,870	$ 5,440,060	$ 1,165	$ 5,155,232	$ 283,663	$ 249,810
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	59,383	53,128			53,128	6,255
Issuance of share-based compensation awards	1,942	1,942		1,942
Non-cash amortization of share-based compensation	6,598	6,598		6,598
Settlement of restricted stock units for shares of common stock (in shares)			459,050
Settlement of restricted stock units for shares of common stock	0	0	$ 5	(5)
Repurchase of common stock and restricted stock units (in shares)			(207,139)
Repurchase of common stock and restricted stock units	(13,994)	(13,994)	$ (3)	(13,991)
Distributions to noncontrolling interests in consolidated property partnerships	(14,842)	0				(14,842)
Adjustment for noncontrolling interest	0	192		192		(192)
Dividends declared per common share and common unit	(63,196)	(62,598)			(62,598)	(598)
Ending balance (in shares) at Mar. 31, 2022			116,716,080
Ending balance at Mar. 31, 2022	5,665,761	5,425,328	$ 1,167	5,149,968	274,193	240,433
Beginning balance (in shares) at Dec. 31, 2021			116,464,169
Beginning balance at Dec. 31, 2021	5,689,870	5,440,060	$ 1,165	5,155,232	283,663	249,810
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	113,358
Ending balance (in shares) at Jun. 30, 2022			116,870,970
Ending balance at Jun. 30, 2022	5,652,551	5,412,894	$ 1,169	5,151,705	260,020	239,657
Beginning balance (in shares) at Mar. 31, 2022			116,716,080
Beginning balance at Mar. 31, 2022	5,665,761	5,425,328	$ 1,167	5,149,968	274,193	240,433
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	53,975	47,105			47,105	6,870
Issuance of share-based compensation awards	635	635		635
Non-cash amortization of share-based compensation	9,665	9,665		9,665
Settlement of restricted stock units for shares of common stock (in shares)			273,382
Settlement of restricted stock units for shares of common stock	0	0	$ 2	(2)
Repurchase of common stock and restricted stock units (in shares)			(118,492)
Repurchase of common stock and restricted stock units	(8,660)	(8,660)		(8,660)
Distributions to noncontrolling interests in consolidated property partnerships	(6,948)	0				(6,948)
Adjustment for noncontrolling interest	0	99		99		(99)
Dividends declared per common share and common unit	(61,877)	(61,278)			(61,278)	(599)
Ending balance (in shares) at Jun. 30, 2022			116,870,970
Ending balance at Jun. 30, 2022	$ 5,652,551	5,412,894	$ 1,169	5,151,705	260,020	239,657
Beginning balance (in shares) at Dec. 31, 2022	116,878,031		116,878,031
Beginning balance at Dec. 31, 2022	$ 5,674,961	5,437,047	$ 1,169	5,170,760	265,118	237,914
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	65,230	56,608			56,608	8,622
Issuance of share-based compensation awards	1,365	1,365		1,365
Non-cash amortization of share-based compensation	11,566	11,566		11,566
Settlement of restricted stock units for shares of common stock (in shares)			445,973
Settlement of restricted stock units for shares of common stock	0	0	$ 4	(4)
Repurchase of common stock and restricted stock units (in shares)			(203,042)
Repurchase of common stock and restricted stock units	(8,363)	(8,363)	$ (2)	(8,361)
Distributions to noncontrolling interests in consolidated property partnerships	(7,068)	0				(7,068)
Adjustment for noncontrolling interest	0	76		76		(76)
Dividends declared per common share and common unit	(65,269)	(64,647)			(64,647)	(622)
Ending balance (in shares) at Mar. 31, 2023			117,120,962
Ending balance at Mar. 31, 2023	$ 5,672,422	5,433,652	$ 1,171	5,175,402	257,079	238,770
Beginning balance (in shares) at Dec. 31, 2022	116,878,031		116,878,031
Beginning balance at Dec. 31, 2022	$ 5,674,961	5,437,047	$ 1,169	5,170,760	265,118	237,914
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 126,505
Ending balance (in shares) at Jun. 30, 2023	117,177,908		117,177,908
Ending balance at Jun. 30, 2023	$ 5,667,594	5,434,094	$ 1,172	5,184,227	248,695	233,500
Beginning balance (in shares) at Mar. 31, 2023			117,120,962
Beginning balance at Mar. 31, 2023	5,672,422	5,433,652	$ 1,171	5,175,402	257,079	238,770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	61,275	55,587			55,587	5,688
Issuance of share-based compensation awards	726	726		726
Non-cash amortization of share-based compensation	9,496	9,496		9,496
Settlement of restricted stock units for shares of common stock (in shares)			103,135
Settlement of restricted stock units for shares of common stock	0	0	$ 1	(1)
Repurchase of common stock and restricted stock units (in shares)			(46,189)
Repurchase of common stock and restricted stock units	(1,340)	(1,340)	$ 0	(1,340)
Distributions to noncontrolling interests in consolidated property partnerships	(10,393)	0				(10,393)
Adjustment for noncontrolling interest	0	(56)		(56)		56
Dividends declared per common share and common unit	$ (64,592)	(63,971)			(63,971)	(621)
Ending balance (in shares) at Jun. 30, 2023	117,177,908		117,177,908
Ending balance at Jun. 30, 2023	$ 5,667,594	$ 5,434,094	$ 1,172	$ 5,184,227	$ 248,695	$ 233,500

CONSOLIDATED STATEMENTS OF EQ_2

CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share and common unit (in dollars per share)	$ 0.54	$ 0.54	$ 0.52	$ 0.52

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 126,505	$ 113,358
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	180,144	181,719
Depreciation of non-real estate furniture, fixtures and equipment	3,894	3,356
Revenue reversals (recoveries) for doubtful accounts, net (Note 6)	3,290	(1,513)
Non-cash amortization of share-based compensation awards	17,764	13,216
Non-cash amortization of deferred financing costs and debt discounts	2,609	1,637
Non-cash amortization of net below market rents	(4,641)	(5,631)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements	(9,910)	(9,204)
Straight-line rents	(13,636)	(28,033)
Amortization of right of use ground lease assets	508	715
Net change in other operating assets	(8,244)	(5,135)
Net change in other operating liabilities	(14,733)	14,464
Net cash provided by operating activities	283,550	278,949
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development and redevelopment properties and undeveloped land	(214,277)	(227,174)
Expenditures for operating properties and other capital assets	(45,113)	(45,512)
Expenditures for acquisitions of development properties and undeveloped land	0	(40,033)
Net cash used in investing activities	(259,390)	(312,719)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on unsecured debt (Note 3)	150,000	0
Financing costs	(2,012)	(601)
Repurchase of common stock and restricted stock units	(9,703)	(22,654)
Distributions to noncontrolling interests in consolidated property partnerships	(17,477)	(21,806)
Dividends and distributions paid to common stockholders and common unitholders	(127,602)	(122,450)
Principal payments and repayments of secured debt	(2,860)	(2,750)
Net cash used in financing activities	(9,654)	(170,261)
Net increase (decrease) in cash and cash equivalents and restricted cash	14,506	(204,031)
Cash and cash equivalents and restricted cash, beginning of period	347,379	427,083
Cash and cash equivalents and restricted cash, end of period	$ 361,885	$ 223,052

CONSOLIDATED BALANCE SHEETS (KI

CONSOLIDATED BALANCE SHEETS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
REAL ESTATE ASSETS:
Land and improvements	$ 1,738,242	$ 1,738,242
Buildings and improvements	8,353,596	8,302,081
Undeveloped land and construction in progress	1,894,545	1,691,860
Total real estate assets held for investment	11,986,383	11,732,183
Accumulated depreciation and amortization	(2,369,515)	(2,218,710)
Total real estate assets held for investment, net	9,616,868	9,513,473
CASH AND CASH EQUIVALENTS	361,885	347,379
MARKETABLE SECURITIES (Note 8)	25,786	23,547
CURRENT RECEIVABLES, NET	10,686	20,583
DEFERRED RENT RECEIVABLES, NET	463,640	452,200
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET	230,559	250,846
RIGHT OF USE GROUND LEASE ASSETS	126,022	126,530
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 2)	75,588	62,429
TOTAL ASSETS	10,911,034	10,796,987
LIABILITIES:
Secured debt, net (Notes 3 and 8)	240,142	242,938
Unsecured debt, net (Notes 3 and 8)	4,172,833	4,020,058
Accounts payable, accrued expenses and other liabilities	377,733	392,360
Ground lease liabilities	124,678	124,994
Accrued dividends and distributions (Note 13)	64,438	64,285
Deferred revenue and acquisition-related intangible liabilities, net	185,429	195,959
Rents received in advance and tenant security deposits	78,187	81,432
Liabilities	5,243,440	5,122,026
COMMITMENTS AND CONTINGENCIES (Note 7)
CAPITAL:
TOTAL LIABILITIES AND EQUITY (CAPITAL)	10,911,034	10,796,987
Kilroy Realty L.P.
REAL ESTATE ASSETS:
Land and improvements	1,738,242	1,738,242
Buildings and improvements	8,353,596	8,302,081
Undeveloped land and construction in progress	1,894,545	1,691,860
Total real estate assets held for investment	11,986,383	11,732,183
Accumulated depreciation and amortization	(2,369,515)	(2,218,710)
Total real estate assets held for investment, net	9,616,868	9,513,473
CASH AND CASH EQUIVALENTS	361,885	347,379
MARKETABLE SECURITIES (Note 8)	25,786	23,547
CURRENT RECEIVABLES, NET	10,686	20,583
DEFERRED RENT RECEIVABLES, NET	463,640	452,200
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET	230,559	250,846
RIGHT OF USE GROUND LEASE ASSETS	126,022	126,530
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 2)	75,588	62,429
TOTAL ASSETS	10,911,034	10,796,987
LIABILITIES:
Secured debt, net (Notes 3 and 8)	240,142	242,938
Unsecured debt, net (Notes 3 and 8)	4,172,833	4,020,058
Accounts payable, accrued expenses and other liabilities	377,733	392,360
Ground lease liabilities	124,678	124,994
Accrued dividends and distributions (Note 13)	64,438	64,285
Deferred revenue and acquisition-related intangible liabilities, net	185,429	195,959
Rents received in advance and tenant security deposits	78,187	81,432
Liabilities	5,243,440	5,122,026
COMMITMENTS AND CONTINGENCIES (Note 7)
CAPITAL:
Common units, 116,716,080 and 116,464,169 held by the general partner and 1,150,574 and 1,150,574 held by common limited partners issued and outstanding	5,487,452	5,490,571
Noncontrolling interests in consolidated property partnerships (Note 1)	180,142	184,390
Total capital	5,667,594	5,674,961
TOTAL LIABILITIES AND EQUITY (CAPITAL)	$ 10,911,034	$ 10,796,987

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (KILROY REALTY, L.P.)(Parenthetical) - Common Units - Kilroy Realty L.P. - shares	Jun. 30, 2023	Dec. 31, 2022
General partner, units issued (in shares)	117,177,908	116,878,031
General partners, units outstanding (in shares)	117,177,908	116,878,031
Limited partners, units issued (in shares)	1,150,574	1,150,574
Limited partners, units outstanding (in shares)	1,150,574	1,150,574

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 6)	$ 281,309	$ 268,576	$ 571,413	$ 531,784
Other property income	2,973	2,608	5,671	4,901
Total revenues	284,282	271,184	577,084	536,685
EXPENSES
Property expenses	55,008	49,922	108,788	95,346
Real estate taxes	28,277	25,433	56,505	51,303
Ground leases	2,413	1,876	4,782	3,702
General and administrative expenses (Note 5)	22,659	22,120	46,595	44,901
Leasing costs	1,326	1,447	2,698	2,460
Depreciation and amortization	90,362	96,415	184,038	185,075
Total expenses	200,045	197,213	403,406	382,787
OTHER INCOME (EXPENSES)
Interest and other income, net	3,421	125	4,881	206
Interest expense (Note 3)	(26,383)	(20,121)	(52,054)	(40,746)
Total other expenses	(22,962)	(19,996)	(47,173)	(40,540)
NET INCOME	61,275	53,975	126,505	113,358
Total income attributable to noncontrolling interests	(5,688)	(6,870)	(14,310)	(13,125)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 55,587	$ 47,105	$ 112,195	$ 100,233
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Weighted average common shares outstanding – basic (in shares)	117,154,946	116,822,234	117,107,402	116,736,706
Weighted average common shares outstanding – diluted (in shares)	117,359,517	117,184,938	117,382,783	117,122,861
Kilroy Realty L.P.
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 6)	$ 281,309	$ 268,576	$ 571,413	$ 531,784
Other property income	2,973	2,608	5,671	4,901
Total revenues	284,282	271,184	577,084	536,685
EXPENSES
Property expenses	55,008	49,922	108,788	95,346
Real estate taxes	28,277	25,433	56,505	51,303
Ground leases	2,413	1,876	4,782	3,702
General and administrative expenses (Note 5)	22,659	22,120	46,595	44,901
Leasing costs	1,326	1,447	2,698	2,460
Depreciation and amortization	90,362	96,415	184,038	185,075
Total expenses	200,045	197,213	403,406	382,787
OTHER INCOME (EXPENSES)
Interest and other income, net	3,421	125	4,881	206
Interest expense (Note 3)	(26,383)	(20,121)	(52,054)	(40,746)
Total other expenses	(22,962)	(19,996)	(47,173)	(40,540)
NET INCOME	61,275	53,975	126,505	113,358
Total income attributable to noncontrolling interests	(5,151)	(6,355)	(13,213)	(12,094)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 56,124	$ 47,620	$ 113,292	$ 101,264
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Weighted average common shares outstanding – basic (in shares)	118,305,520	117,972,808	118,257,976	117,887,280
Weighted average common shares outstanding – diluted (in shares)	118,510,091	118,335,512	118,533,357	118,273,435

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITAL (KILROY REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 61,275	$ 65,230	$ 53,975	$ 59,383	$ 126,505	$ 113,358
Non-cash amortization of share-based compensation	9,496	11,566	9,665	6,598
Settlement of restricted stock units	0	0	0	0
Distributions to noncontrolling interests in consolidated property partnerships	(10,393)	(7,068)	(6,948)	(14,842)
Noncontrolling Interests in Consolidated Property Partnerships
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	5,688	8,622	6,870	6,255
Distributions to noncontrolling interests in consolidated property partnerships	(10,393)	(7,068)	(6,948)	(14,842)
Kilroy Realty L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	5,672,422	5,674,961	5,665,761	5,689,870	5,674,961	5,689,870
Net income	61,275	65,230	53,975	59,383	126,505	113,358
Issuance of share-based compensation awards	726	1,365	635	1,942
Non-cash amortization of share-based compensation	9,496	11,566	9,665	6,598
Settlement of restricted stock units	0	0	0	0
Repurchase of common units and restricted stock units	(1,340)	(8,363)	(8,660)	(13,994)
Distributions to noncontrolling interests in consolidated property partnerships	(10,393)	(7,068)	(6,948)	(14,842)
Distributions declared per common unit	(64,592)	(65,269)	(61,877)	(63,196)
Ending balance	$ 5,667,594	$ 5,672,422	$ 5,652,551	$ 5,665,761	$ 5,667,594	$ 5,652,551
Kilroy Realty L.P. | Partners’ Capital
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in shares)	118,271,536	118,028,605	117,866,654	117,614,743	118,028,605	117,614,743
Beginning balance	$ 5,487,038	$ 5,490,571	$ 5,478,800	$ 5,493,806	$ 5,490,571	$ 5,493,806
Net income	56,124	57,168	47,620	53,644
Issuance of share-based compensation awards	726	1,365	635	1,942
Non-cash amortization of share-based compensation	$ 9,496	$ 11,566	$ 9,665	$ 6,598
Settlement of restricted stock units (in shares)	103,135	445,973	273,382	459,050
Repurchase of common units and restricted stock units (in shares)	(46,189)	(203,042)	(118,492)	(207,139)
Repurchase of common units and restricted stock units	$ (1,340)	$ (8,363)	$ (8,660)	$ (13,994)
Distributions declared per common unit	$ (64,592)	$ (65,269)	$ (61,877)	$ (63,196)
Ending balance (in shares)	118,328,482	118,271,536	118,021,544	117,866,654	118,328,482	118,021,544
Ending balance	$ 5,487,452	$ 5,487,038	$ 5,466,183	$ 5,478,800	$ 5,487,452	$ 5,466,183
Kilroy Realty L.P. | Noncontrolling Interests in Consolidated Property Partnerships
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	185,384	184,390	186,961	196,064	184,390	196,064
Net income	5,151	8,062	6,355	5,739
Distributions to noncontrolling interests in consolidated property partnerships	(10,393)	(7,068)	(6,948)	(14,842)
Ending balance	$ 180,142	$ 185,384	$ 186,368	$ 186,961	$ 180,142	$ 186,368

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CAPITAL (KILROY REALTY, L.P.) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Kilroy Realty L.P.
Dividends declared per common unit (in dollars per unit)	$ 0.54	$ 0.54	$ 0.52	$ 0.52

CONSOLIDATED STATEMENTS OF CA_3

CONSOLIDATED STATEMENTS OF CASH FLOWS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 126,505	$ 113,358
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	180,144	181,719
Depreciation of non-real estate furniture, fixtures and equipment	3,894	3,356
Revenue reversals (recoveries) for doubtful accounts, net (Note 6)	3,290	(1,513)
Non-cash amortization of share-based compensation awards	17,764	13,216
Non-cash amortization of deferred financing costs and debt discounts	2,609	1,637
Non-cash amortization of net below market rents	(4,641)	(5,631)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements	(9,910)	(9,204)
Straight-line rents	(13,636)	(28,033)
Amortization of right of use ground lease assets	508	715
Net change in other operating assets	(8,244)	(5,135)
Net change in other operating liabilities	(14,733)	14,464
Net cash provided by operating activities	283,550	278,949
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development and redevelopment properties and undeveloped land	(214,277)	(227,174)
Expenditures for operating properties and other capital assets	(45,113)	(45,512)
Expenditures for acquisitions of development properties and undeveloped land	0	(40,033)
Net cash used in investing activities	(259,390)	(312,719)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on unsecured debt (Note 3)	150,000	0
Financing costs	(2,012)	(601)
Repurchase of common stock and restricted stock units	(9,703)	(22,654)
Distributions to noncontrolling interests in consolidated property partnerships	(17,477)	(21,806)
Dividends and distributions paid to common stockholders and common unitholders	(127,602)	(122,450)
Principal payments and repayments of secured debt	(2,860)	(2,750)
Net cash used in financing activities	(9,654)	(170,261)
Net increase (decrease) in cash and cash equivalents and restricted cash	14,506	(204,031)
Cash and cash equivalents and restricted cash, beginning of period	347,379	427,083
Cash and cash equivalents and restricted cash, end of period	361,885	223,052
Kilroy Realty L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	126,505	113,358
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	180,144	181,719
Depreciation of non-real estate furniture, fixtures and equipment	3,894	3,356
Revenue reversals (recoveries) for doubtful accounts, net (Note 6)	3,290	(1,513)
Non-cash amortization of share-based compensation awards	17,764	13,216
Non-cash amortization of deferred financing costs and debt discounts	2,609	1,637
Non-cash amortization of net below market rents	(4,641)	(5,631)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements	(9,910)	(9,204)
Straight-line rents	(13,636)	(28,033)
Amortization of right of use ground lease assets	508	715
Net change in other operating assets	(8,244)	(5,135)
Net change in other operating liabilities	(14,733)	14,464
Net cash provided by operating activities	283,550	278,949
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development and redevelopment properties and undeveloped land	(214,277)	(227,174)
Expenditures for operating properties and other capital assets	(45,113)	(45,512)
Expenditures for acquisitions of development properties and undeveloped land	0	(40,033)
Net cash used in investing activities	(259,390)	(312,719)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on unsecured debt (Note 3)	150,000	0
Financing costs	(2,012)	(601)
Repurchase of common stock and restricted stock units	(9,703)	(22,654)
Distributions to noncontrolling interests in consolidated property partnerships	(17,477)	(21,806)
Dividends and distributions paid to common stockholders and common unitholders	(127,602)	(122,450)
Principal payments and repayments of secured debt	(2,860)	(2,750)
Net cash used in financing activities	(9,654)	(170,261)
Net increase (decrease) in cash and cash equivalents and restricted cash	14,506	(204,031)
Cash and cash equivalents and restricted cash, beginning of period	347,379	427,083
Cash and cash equivalents and restricted cash, end of period	$ 361,885	$ 223,052

Organization, Ownership and Bas

Organization, Ownership and Basis of Presentation	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Ownership and Basis of Presentation	Organization, Ownership and Basis of Presentation Organization and Ownership Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in premier office, life science and mixed-use submarkets in the United States. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in Greater Los Angeles, San Diego County, the San Francisco Bay Area, Greater Seattle and Austin, Texas, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.” We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”). We generally conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the terms “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” refer to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership. Our stabilized portfolio of operating properties was comprised of the following properties at June 30, 2023: Number of Rentable Number of Percentage Occupied (1) Percentage Leased Stabilized Office Properties (2) 119 16,214,594 401 86.6 % 88.6 % ________________________ (1) Represents economic occupancy. (2) Includes stabilized life science and retail space. Number of Number of 2023 Average Occupancy Stabilized Residential Properties 3 1,001 93.0 % Our stabilized portfolio includes all of our properties with the exception of development properties currently committed for construction, under construction, or in the tenant improvement phase, redevelopment properties under construction, undeveloped land and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and life science properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets at the historical cost of the property as the projects or phases of projects are placed in service. As of June 30, 2023, the following properties were excluded from our stabilized portfolio: Number of Estimated Rentable Square Feet (1) In-process development projects - tenant improvement 2 805,000 In-process development projects - under construction 1 875,000 In-process redevelopment projects - under construction 2 100,000 ________________________ (1) Estimated rentable square feet upon completion. We did not have any properties held for sale at June 30, 2023. Our stabilized portfolio also excludes our future development pipeline, which as of June 30, 2023 was comprised of eight future development sites, representing approximately 64 gross acres of undeveloped land. As of June 30, 2023, all of our properties, development projects and redevelopment projects were owned and all of our business was conducted in the state of California with the exception of ten stabilized office properties and one future development project located in the state of Washington, and one development project in the tenant improvement phase and one future development project in Austin, Texas. All of our properties, development projects and redevelopment projects are 100% owned, excluding four office properties owned by three consolidated property partnerships. Two of the three consolidated property partnerships, 100 First Street Member, LLC (“100 First LLC”) and 303 Second Street Member, LLC (“303 Second LLC”), each owned one office property in San Francisco, California through subsidiary REITs. As of June 30, 2023, the Company owned a 56% common equity interest in both 100 First LLC and 303 Second LLC. The third consolidated property partnership, Redwood City Partners, LLC (“Redwood LLC”) owned two office properties in Redwood City, California. As of June 30, 2023, the Company owned an approximate 93% common equity interest in Redwood LLC. The remaining interests in all three property partnerships were owned by unrelated third parties. Ownership and Basis of Presentation The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. All intercompany balances and transactions have been eliminated in the consolidated financial statements. As of June 30, 2023, the Company owned an approximate 99.0% common general partnership interest in the Operating Partnership. The remaining approximate 1.0% common limited partnership interest in the Operating Partnership as of June 30, 2023 was owned by non-affiliated investors and certain of our executive officers and directors. Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. Generally, the number of common units held by the Company is equivalent to the number of outstanding shares of the Company’s common stock, and the rights of all the common units to quarterly distributions and payments in liquidation mirror those of the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Seventh Amended and Restated Agreement of Limited Partnership, as amended, the “Partnership Agreement”. With the exception of the Operating Partnership and our consolidated property partnerships, all of our subsidiaries are wholly-owned. The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2022. Variable Interest Entities The Operating Partnership is a variable interest entity (“VIE”) that is consolidated by the Company as the primary beneficiary as the Operating Partnership is a limited partnership in which the common limited partners do not have substantive kick-out or participating rights. At June 30, 2023, the consolidated financial statements of the Company included two VIEs in addition to the Operating Partnership: 100 First LLC and 303 Second LLC. At June 30, 2023, the Company and the Operating Partnership were determined to be the primary beneficiaries of these two VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. As of June 30, 2023, the two VIEs’ total assets, liabilities and noncontrolling interests included on our consolidated balance sheet were approximately $423.0 million (of which $354.7 million related to real estate held for investment), approximately $25.9 million and approximately $175.4 million , respectively. Revenues, income and net assets generated by 100 First LLC and 303 Second LLC may only be used to settle their contractual obligations, which primarily consist of operating expenses, capital expenditures and required distributions. At December 31, 2022, the consolidated financial statements of the Company included two VIEs in addition to the Operating Partnership: 100 First LLC and 303 Second LLC. At December 31, 2022, the Company and the Operating Partnership were determined to be the primary beneficiaries of these two VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. At December 31, 2022, the impact of consolidating the VIEs increased the Company’s total assets, liabilities and noncontrolling interests on our consolidated balance sheet by approximately $438.7 million (of which $362.7 million related to real estate held for investment), approximately $31.5 million and approximately $179.4 million, respectively.

Prepaid Expenses and Other Asse

Prepaid Expenses and Other Assets, Net	6 Months Ended
	Jun. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid Expenses and Other Assets, Net	Prepaid Expenses and Other Assets, Net Prepaid expenses and other assets, net consisted of the following at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Furniture, fixtures and other long-lived assets, net $ 40,639 $ 41,538 Prepaid expenses and deferred financing costs, net 23,442 11,364 Other assets 11,507 9,527 Total prepaid expenses and other assets, net $ 75,588 $ 62,429

Secured and Unsecured Debt of t

Secured and Unsecured Debt of the Operating Partnership	6 Months Ended
	Jun. 30, 2023
Kilroy Realty L.P.
Debt Instrument [Line Items]
Secured and Unsecured Debt of the Operating Partnership	Secured and Unsecured Debt of the Operating Partnership The Company generally guarantees all of the Operating Partnership’s unsecured debt obligations including the unsecured revolving credit facility, the unsecured term loan facility and all of the unsecured senior notes. Unsecured Revolving Credit Facility and Term Loan Facility The following table summarizes the balance and terms of our unsecured revolving credit facility as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Outstanding borrowings $ — $ — Remaining borrowing capacity 1,100,000 1,100,000 Total borrowing capacity (1) $ 1,100,000 $ 1,100,000 Interest rate (2) 6.09 % 5.20 % Facility fee-annual rate (3) 0.200% Maturity date (4) July 31, 2025 ________________________ (1) Total borrowing capacity is reduced by the amount of our outstanding letters of credit which total approximately $5.2 million as of the date of this report. We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $500.0 million under an accordion feature under the terms of the unsecured revolving credit facility. (2) Our unsecured revolving credit facility interest rate was calculated using a contractual rate of Secured Overnight Financing Rate (“SOFR”) plus a SOFR adjustment of 0.10% (“Adjusted SOFR”) and a margin of 0.900% based on our credit rating as of June 30, 2023 and December 31, 2022. We may be entitled to a temporary 0.01% reduction in the interest rate provided we meet certain sustainability goals with respect to the ongoing reduction of greenhouse gas emissions. (3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of June 30, 2023 and December 31, 2022, $4.3 million and $5.3 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility. (4) The maturity date may be extended by two six-month periods, at the Company’s option. The Company intends to borrow under the unsecured revolving credit facility from time to time for general corporate purposes, to finance development and redevelopment expenditures, to fund potential acquisitions and to potentially repay long-term debt and to supplement cash balances given uncertainties and volatility in market conditions. In January 2023, the Operating Partnership entered into the first amendment to its existing unsecured term loan facility agreement to (i) exercise the accordion feature under the term loan agreement to provide for $100.0 million of additional term loan commitments and (ii) increase the borrowing capacity under the accordion feature to provide additional term loan commitments or add one or more tranches of term loans up to an aggregate amount of $650.0 million. In March 2023, the Operating Partnership further amended the unsecured term loan facility agreement to exercise the accordion feature to provide for $20.0 million of additional term loan commitments, bringing the total borrowing capacity of the unsecured term loan facility to $520.0 million. The following table summarizes the balance and terms of our unsecured term loan facility as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Outstanding borrowings $ 350,000 $ 200,000 Remaining borrowing capacity 170,000 200,000 Total borrowing capacity (1) $ 520,000 $ 400,000 Interest rate (2) 6.17 % 5.23 % Undrawn facility fee-annual rate (3) 0.200% Maturity date (4) October 3, 2024 ____________________ (1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $130.0 million and $100.0 million as of June 30, 2023 and December 31, 2022, respectively, under an accordion feature under the terms of the unsecured term loan facility. (2) Our unsecured term loan facility interest rate was calculated using a contractual rate of Adjusted SOFR plus a margin of 0.950% based on our credit rating as of June 30, 2023 and December 31, 2022. (3) Our undrawn facility fee is paid on a quarterly basis and is calculated based on the remaining borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of June 30, 2023 and December 31, 2022, $3.8 million and $4.5 million, respectively, of unamortized deferred financing costs remained to be amortized through the maturity date of our unsecured term loan facility. (4) The maturity date may be extended by two twelve-month periods, at the Company’s option. Debt Covenants and Restrictions The unsecured revolving credit facility, unsecured term loan facility, the unsecured senior notes, including the private placement notes, and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a maximum ratio of secured debt to total asset value, a minimum unsecured debt ratio and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full principal balance of the associated debt becoming immediately due and payable. We were in compliance with all of our debt covenants as of June 30, 2023. Debt Maturities The following table summarizes the stated debt maturities and scheduled amortization payments for all outstanding debt as of June 30, 2023: Year (in thousands) Remaining 2023 $ 2,916 2024 (1) 781,006 2025 406,246 2026 401,317 2027 249,125 2028 400,000 Thereafter 2,200,000 Total aggregate principal value (2) $ 4,440,610 ________________________ (1) Includes the $350.0 million outstanding as of June 30, 2023 on the unsecured term loan facility maturing on October 3, 2024, for which the Company has two twelve-month extension options. (2) Includes gross principal balance of outstanding debt before the effect of the following at June 30, 2023: $21.8 million of unamortized deferred financing costs for the unsecured term loan facility, unsecured senior notes and secured debt and $5.8 million of unamortized discounts for the unsecured senior notes. Capitalized Interest and Loan Fees The following table sets forth gross interest expense, including debt discount and deferred financing cost amortization, net of capitalized interest, for the three and six months ended June 30, 2023 and 2022. The interest expense capitalized was recorded as a cost of development and redevelopment and increased the carrying value of undeveloped land and construction in progress. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands) Gross interest expense $ 45,853 $ 39,612 $ 89,255 $ 79,336 Capitalized interest and deferred financing costs (19,470) (19,491) (37,201) (38,590) Interest expense $ 26,383 $ 20,121 $ 52,054 $ 40,746

Noncontrolling Interests on the

Noncontrolling Interests on the Company's Consolidated Financial Statements	6 Months Ended
	Jun. 30, 2023
Noncontrolling Interest [Abstract]
Noncontrolling Interests on the Company's Consolidated Financial Statements	Noncontrolling Interests on the Company’s Consolidated Financial Statements Common Units of the Operating Partnership The Company owned an approximate 99.0% common general partnership interest in the Operating Partnership as of June 30, 2023, December 31, 2022 and June 30, 2022. The remaining approximate 1.0% common limited partnership interest as of June 30, 2023, December 31, 2022 and June 30, 2022 was owned by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 1,150,574 common units outstanding held by these investors, executive officers and directors as of June 30, 2023, December 31, 2022 and June 30, 2022. The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $0.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $34.4 million and $44.7 million as of June 30, 2023 and December 31, 2022, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation Stockholder Approved Share-Based Incentive Compensation Plan As of June 30, 2023, we maintained one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan, as amended (the “2006 Plan”). The Company has a currently effective registration statement registering 12.6 million shares of our common stock for possible issuance under our 2006 Plan. As of June 30, 2023, approximately 2.9 million shares were available for grant under the 2006 Plan. The calculation of shares available for grant is presented after taking into account a reserve for a sufficient number of shares to cover the vesting and payment of 2006 Plan awards that were outstanding on that date, including performance-based vesting awards at (i) levels actually achieved for the performance conditions (as defined below) for which the performance period has been completed and (ii) at maximum levels for the other performance and market conditions (as defined below) for awards still in a performance period. Executive Transitions On March 30, 2023, our Chief Executive Officer (“CEO”) announced his retirement effective December 31, 2023. Additionally, as previously disclosed, the Company and our former President entered into a separation agreement in 2022 under which he continued to serve as an officer of the Company until the scheduled expiration date of his employment agreement on March 1, 2023. For our CEO, the vesting of all unvested share-based compensation awards is being accelerated through December 31, 2023 and the final number of any restricted stock units (“RSUs”) subject to market and/or performance-based vesting requirements that vest will be based upon a shortened performance period ending on December 31, 2023. Share-based compensation expense for these awards will be recognized based on our current assumption of the achievement of market and/or performance-based vesting requirements for the shortened performance periods. For our former President, the vesting of all unvested share-based compensation awards was accelerated through March 1, 2023 and the final number of RSUs earned that were subject to market and/or performance-based vesting requirements was based upon the actual achievement of the market and/or performance conditions for a shortened performance period ending on March 1, 2023. For the three and six months ended June 30, 2023, we recognized $5.4 million and $13.2 million, respectively, of stock compensation expense related to the accelerated vesting of awards for our CEO and former President. 2023 Share-Based Compensation Grants In February 2023, the Executive Compensation Committee of the Company’s Board of Directors awarded 517,066 restricted stock units to certain officers of the Company under the 2006 Plan, which included 300,007 RSUs (at the target level of performance) that are subject to market and/or performance-based vesting requirements (the “2023 Performance-Based RSUs”) and 217,059 RSUs that are subject to time-based vesting requirements (the “2023 Time-Based RSUs”). 2023 Performance-Based RSU Grant The 2023 Performance-Based RSUs are scheduled to vest at the end of a three year period (consisting of calendar years 2023-2025), except for our CEO, whose RSUs are scheduled to vest on his announced retirement date of December, 31, 2023. A target number of 2023 Performance-Based RSUs were awarded, and the final number of 2023 Performance-Based RSUs that vest (which may be more or less than the target number) will be based upon (1) during the first calendar year of the three year performance measurement period, the achievement of pre-set FFO per share goals that applies to 100% of the Performance-Based RSUs awarded (the “FFO Performance Condition”) and (2) a performance measure that applies to 50% of the award based upon a measure of the Company’s average debt to EBITDA ratio for the three year performance period (the “Debt to EBITDA Ratio Performance Condition”) and a market measure that applies to the other 50% of the award based upon the relative ranking of the Company’s total stockholder return for the three year performance period compared to the total stockholder returns of an established comparison group of companies over the same period (the “Market Condition”). The 2023 Performance-Based RSUs are also subject to a three year service vesting provision (the “service vesting condition”) and are scheduled to cliff vest on the date the final vesting percentage is determined following the end of the three year performance period under the awards. The number of 2023 Performance-Based RSUs ultimately earned could fluctuate from the target number of 2023 Performance-Based RSUs granted based upon the levels of achievement for the FFO Performance Condition, the Debt to EBITDA Ratio Performance Condition, the Market Condition, and the extent to which the service vesting condition is satisfied. The estimate of the number of 2023 Performance-Based RSUs earned is evaluated quarterly during the performance period based on our estimate for each of the performance conditions measured against the applicable goals. Compensation expense for the 2023 Performance-Based RSU grant is recognized on a straight-line basis over the requisite service period for each participant, which is generally the three year service period, except for our CEO, whose compensation expense is recognized on an accelerated basis through his announced retirement date of December 31, 2023. During the six months ended June 30, 2023, we recognized $4.2 million of compensation expense for the 2023 Performance-Based RSU grant assuming the 2023 FFO Performance Condition is met at 111% of the target level of achievement (116.5% for our CEO) and the 2023 Debt to EBITDA Ratio Performance Condition is met at 100% of the target level of achievement (175.0% for our CEO). In the event we achieve a lower level of performance or fail to meet the FFO performance condition, we would reverse a portion or all of the $4.2 million of compensation expense. Each 2023 Performance-Based RSU represents the right to receive one share of our common stock in the future, subject to, and as modified by the Company’s level of achievement of the applicable performance and market conditions. The fair value of the portion of the award subject to the Debt to EBITDA Ratio Performance Condition was calculated using the closing price of the Company’s common stock on the valuation date noted below. The fair value of the portion of the award subject to the Market Condition was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below, which resulted in the following grant date fair value per share. Fair Value Assumptions Valuation date February 6, 2023 Fair value per share on valuation date (1) $40.10 Expected share price volatility 35.0% Risk-free interest rate 4.12% ________________________ (1) For one participant, the fair value per share on the valuation date for their 2023 Performance-Based RSUs is $40.43. The computation of expected volatility was based on a blend of the historical volatility of our shares of common stock over a period of twice the remaining performance period as of the grant date and implied volatility data based on the observed pricing of six month publicly-traded options on shares of our common stock. The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at February 6, 2023. The fair value of the 2023 Performance-Based RSU grant as of the valuation date noted above, based on a target level of achievement, was $12.0 million. For the three and six months ended June 30, 2023, we recorded compensation expense based upon the grant date fair value per share for each component multiplied by the estimated number of RSUs to be earned. 2023 Time-Based RSU Grant The 2023 Time-Based RSUs are scheduled to vest in three equal annual installments beginning on January 5, 2024 through January 5, 2026. Compensation expense for the 2023 Time-Based RSUs is recognized on a straight-line basis over the requisite service period, which is generally the explicit service period except for our CEO, whose compensation expense is recognized on an accelerated basis through his announced retirement date of December 31, 2023. Each 2023 Time-Based RSU represents the right to receive one share of our common stock in the future, subject to continued employment through the applicable vesting date, unless accelerated upon separation of employment, provided certain conditions are met. The total grant date fair value of the 2023 Time-Based RSU awards was $8.6 million, which was based on the $39.65 closing share price of the Company’s common stock on the NYSE on the February 6, 2023 grant date. 2022 and 2021 Performance-Based RSUs Compensation cost for the 2022 performance-based RSUs for the three and six months ended June 30, 2023 assumes the 2022 Debt to EBITDA Ratio Performance Condition is met at 150% of the target level of achievement (175.0% for our CEO). Compensation cost for the 2021 performance-based RSUs for the three and six months ended June 30, 2023 assumes the 2021 Debt to EBITDA Ratio Performance Condition is met at 150% of the target level of achievement (175.0% for our CEO). Share-Based Compensation Cost Recorded During the Period The total compensation cost for all share-based compensation programs was $9.5 million and $9.7 million for the three months ended June 30, 2023 and 2022, respectively, and $21.0 million and $16.3 million for the six months ended June 30, 2023 and 2022, respectively. Share-based compensation costs for the three and six months ended June 30, 2023 include $5.4 million and $13.2 million, respectively, of accelerated share-based compensation costs for our CEO and former President as discussed above. Of the total share-based compensation costs, $1.8 million and $3.3 million was capitalized as part of the real estate assets for the three and six months ended June 30, 2023, respectively, and $1.7 million and $3.0 million was capitalized as part of the real estate assets for the three and six months ended June 30, 2022, respectively. As of June 30, 2023, there was approximately $34.1 million of total unrecognized compensation cost related to nonvested RSUs granted under share-based compensation arrangements. Such amount is based in part upon the estimated future outcome of the performance metrics as of June 30, 2023, and the actual compensation cost ultimately recognized could increase or decrease from this estimate based upon actual performance results. These costs are expected to be recognized over a weighted-average period of 1.3 years, which includes the shortened vesting period for our CEO due to his announced retirement on December 31, 2023. The remaining compensation cost related to these nonvested RSU awards had been recognized in periods prior to June 30, 2023.

Rental Income and Future Minimu

Rental Income and Future Minimum Rent	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Rental Income and Future Minimum Rent	Rental Income and Future Minimum Rent Our rental income is primarily comprised of payments defined under leases and are subject to scheduled fixed increases. Additionally, rental income includes variable payments for tenant reimbursements of property-related expenses and payments based on a percentage of tenant’s sales. The table below sets forth the allocation of rental income between fixed and variable payments and net collectability reversals or recoveries for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands) Fixed lease payments $ 235,329 $ 229,233 $ 481,164 $ 454,050 Variable lease payments 46,832 39,141 93,539 76,221 Net collectability (reversals) recoveries (1) (852) 202 (3,290) 1,513 Total rental income $ 281,309 $ 268,576 $ 571,413 $ 531,784 _____________________ (1) Represents adjustments to rental income related to our assessment of the collectability of amounts due under leases with our tenants, including recognition of deferred rent balances associated with tenants restored from a cash basis of revenue recognition to an accrual basis of revenue recognition and allowances for uncollectible receivables and leases deemed not probable of collection. We have operating leases with tenants that expire at various dates through 2048 and are subject to scheduled fixed increases. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases, which includes amounts contractually due from leases that are on a cash basis of reporting due to creditworthiness considerations, as of June 30, 2023 for future periods is summarized as follows: Year Ending (in thousands) Remaining 2023 $ 404,358 2024 803,175 2025 788,631 2026 736,898 2027 672,448 2028 627,451 Thereafter 1,895,858 Total (1) $ 5,928,819 _____________________ (1) Excludes residential leases and leases with a term of one year or less.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies General As of June 30, 2023, we had commitments of approximately $497.5 million, excluding our ground lease commitments, for contracts and executed leases directly related to our operating, development and redevelopment properties. Environmental Matters As of June 30, 2023, we had accrued environmental remediation liabilities of approximately $76.3 million

Fair Value Measurements and Dis

Fair Value Measurements and Disclosures	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements and Disclosures	Fair Value Measurements and Disclosures Assets and Liabilities Reported at Fair Value The only assets we record at fair value on our consolidated financial statements are the marketable securities related to our Deferred Compensation Plan. The following table sets forth the fair value of our marketable securities as of June 30, 2023 and December 31, 2022: Fair Value (Level 1) (1) June 30, 2023 December 31, 2022 Description (in thousands) Marketable securities (2) $ 25,786 $ 23,547 ________________________ (1) Based on quoted prices in active markets for identical securities. (2) The marketable securities are held in a limited rabbi trust. Financial Instruments Disclosed at Fair Value The following table sets forth the carrying value and the fair value of our other financial instruments as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Carrying Fair (1) Carrying Fair (1) (in thousands) Liabilities Secured debt, net $ 240,142 $ 220,580 $ 242,938 $ 225,847 Unsecured debt, net $ 4,172,833 $ 3,551,407 $ 4,020,058 $ 3,500,420 ________________________ (1) Fair value calculated using Level 2 inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

Net Income Available to Common

Net Income Available to Common Stockholders Per Share of the Company	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Income Available to Common Stockholders Per Share of the Company	Net Income Available to Common Stockholders Per Share of the Company The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except share and per share amounts) Numerator: Net income available to common stockholders $ 55,587 $ 47,105 $ 112,195 $ 100,233 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common stockholders $ 55,261 $ 46,825 $ 111,505 $ 99,540 Denominator: Basic weighted average vested shares outstanding 117,154,946 116,822,234 117,107,402 116,736,706 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested shares and common stock equivalents outstanding 117,359,517 117,184,938 117,382,783 117,122,861 Basic earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________ (1) Participating securities include certain time-based RSUs and vested market measure-based RSUs. Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common shares, including stock options and RSUs are considered in our diluted earnings per share calculation for the three and six months ended June 30, 2023 and 2022. Certain market measure-based RSUs are not included in dilutive securities for the three and six months ended June 30, 2023 and 2022, as not all performance metrics had been met by the end of the applicable reporting periods. See Note 5 “Share-Based Compensation” for additional information regarding share-based compensation.

Net Income Available to Commo_2

Net Income Available to Common Unitholders Per Unit of the Operating Partnership	6 Months Ended
	Jun. 30, 2023
Net Income Available To Common Unitholders [Line Items]
Net Income Available to Common Unitholders Per Unit of the Operating Partnership	Net Income Available to Common Stockholders Per Share of the Company The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except share and per share amounts) Numerator: Net income available to common stockholders $ 55,587 $ 47,105 $ 112,195 $ 100,233 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common stockholders $ 55,261 $ 46,825 $ 111,505 $ 99,540 Denominator: Basic weighted average vested shares outstanding 117,154,946 116,822,234 117,107,402 116,736,706 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested shares and common stock equivalents outstanding 117,359,517 117,184,938 117,382,783 117,122,861 Basic earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________ (1) Participating securities include certain time-based RSUs and vested market measure-based RSUs. Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common shares, including stock options and RSUs are considered in our diluted earnings per share calculation for the three and six months ended June 30, 2023 and 2022. Certain market measure-based RSUs are not included in dilutive securities for the three and six months ended June 30, 2023 and 2022, as not all performance metrics had been met by the end of the applicable reporting periods. See Note 5 “Share-Based Compensation” for additional information regarding share-based compensation.
Kilroy Realty L.P.
Net Income Available To Common Unitholders [Line Items]
Net Income Available to Common Unitholders Per Unit of the Operating Partnership	Net Income Available to Common Unitholders Per Unit of the Operating Partnership The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except unit and per unit amounts) Numerator: Net income available to common unitholders $ 56,124 $ 47,620 $ 113,292 $ 101,264 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common unitholders $ 55,798 $ 47,340 $ 112,602 $ 100,571 Denominator: Basic weighted average vested units outstanding 118,305,520 117,972,808 118,257,976 117,887,280 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested units and common unit equivalents outstanding 118,510,091 118,335,512 118,533,357 118,273,435 Basic earnings per unit: Net income available to common unitholders per unit $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per unit: Net income available to common unitholders per unit $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________ (1) Participating securities include certain time-based RSUs and vested market measure-based RSUs. Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common units, including stock options and RSU are considered in our diluted earnings per share calculation for the three and six months ended June 30, 2023 and 2022. Certain market measure-based RSUs are not included in dilutive securities for the three and six months ended June 30, 2023 and 2022, as not all performance metrics had been met by the end of the applicable reporting periods. See Note 5 “Share-Based Compensation” for additional information regarding share-based compensation.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information of the Company	6 Months Ended
	Jun. 30, 2023
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information of the Company	Supplemental Cash Flow Information of the Company Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 13) $ 64,438 $ 61,880 The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information of the Operating Partnership	6 Months Ended
	Jun. 30, 2023
Other Significant Noncash Transactions [Line Items]
Supplemental Cash Flow Information of the Operating Partnership	Supplemental Cash Flow Information of the Company Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 13) $ 64,438 $ 61,880 The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052
Kilroy Realty L.P.
Other Significant Noncash Transactions [Line Items]
Supplemental Cash Flow Information of the Operating Partnership	Supplemental Cash Flow Information of the Operating Partnership Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of distributions payable to common unitholders (Note 13) $ 64,438 $ 61,880 The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On July 12, 2023, aggregate dividends, distributions and dividend equivalents of $64.4 million were paid to common stockholders, common unitholders and RSU holders of record on June 30, 2023. On July 20, 2023, certain of our and the Operating Partnership’s subsidiaries entered into a $375.0 million mortgage loan transaction (the “Loan”) secured by, among other things, a deed of trust, assignment of leases and rents, security agreement and fixture filing encumbering two office buildings, 608 apartment units and over 95,000 square feet of retail at the Company’s One Paseo mixed-use campus in Del Mar, California. The Loan matures on August 10, 2034, bears interest at an annual rate of 5.90% and requires monthly interest payments only. In addition, the Operating Partnership has entered into a guaranty in favor of the lender in connection with the Loan. The Loan is generally non-recourse to the Operating Partnership, but the lender has recourse to the Operating Partnership for certain recourse exceptions.

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Organization, Ownership and B_2

Organization, Ownership and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation Policy	The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. All intercompany balances and transactions have been eliminated in the consolidated financial statements.
Basis of Accounting	The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2022.

Organization, Ownership and B_3

Organization, Ownership and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Real Estate Properties	Our stabilized portfolio of operating properties was comprised of the following properties at June 30, 2023: Number of Rentable Number of Percentage Occupied (1) Percentage Leased Stabilized Office Properties (2) 119 16,214,594 401 86.6 % 88.6 % ________________________ (1) Represents economic occupancy. (2) Includes stabilized life science and retail space. Number of Number of 2023 Average Occupancy Stabilized Residential Properties 3 1,001 93.0 % As of June 30, 2023, the following properties were excluded from our stabilized portfolio: Number of Estimated Rentable Square Feet (1) In-process development projects - tenant improvement 2 805,000 In-process development projects - under construction 1 875,000 In-process redevelopment projects - under construction 2 100,000 ________________________ (1) Estimated rentable square feet upon completion.

Prepaid Expenses and Other As_2

Prepaid Expenses and Other Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Prepaid Expenses and Other Assets, Net	Prepaid expenses and other assets, net consisted of the following at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Furniture, fixtures and other long-lived assets, net $ 40,639 $ 41,538 Prepaid expenses and deferred financing costs, net 23,442 11,364 Other assets 11,507 9,527 Total prepaid expenses and other assets, net $ 75,588 $ 62,429

Secured and Unsecured Debt of_2

Secured and Unsecured Debt of the Operating Partnership (Tables) - Kilroy Realty L.P.	6 Months Ended
	Jun. 30, 2023
Debt Instrument [Line Items]
Schedule of Unsecured Revolving Credit Facility	The following table summarizes the balance and terms of our unsecured revolving credit facility as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Outstanding borrowings $ — $ — Remaining borrowing capacity 1,100,000 1,100,000 Total borrowing capacity (1) $ 1,100,000 $ 1,100,000 Interest rate (2) 6.09 % 5.20 % Facility fee-annual rate (3) 0.200% Maturity date (4) July 31, 2025 ________________________ (1) Total borrowing capacity is reduced by the amount of our outstanding letters of credit which total approximately $5.2 million as of the date of this report. We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $500.0 million under an accordion feature under the terms of the unsecured revolving credit facility. (2) Our unsecured revolving credit facility interest rate was calculated using a contractual rate of Secured Overnight Financing Rate (“SOFR”) plus a SOFR adjustment of 0.10% (“Adjusted SOFR”) and a margin of 0.900% based on our credit rating as of June 30, 2023 and December 31, 2022. We may be entitled to a temporary 0.01% reduction in the interest rate provided we meet certain sustainability goals with respect to the ongoing reduction of greenhouse gas emissions. (3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of June 30, 2023 and December 31, 2022, $4.3 million and $5.3 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility. (4) The maturity date may be extended by two six-month periods, at the Company’s option. The following table summarizes the balance and terms of our unsecured term loan facility as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 (in thousands) Outstanding borrowings $ 350,000 $ 200,000 Remaining borrowing capacity 170,000 200,000 Total borrowing capacity (1) $ 520,000 $ 400,000 Interest rate (2) 6.17 % 5.23 % Undrawn facility fee-annual rate (3) 0.200% Maturity date (4) October 3, 2024 ____________________ (1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $130.0 million and $100.0 million as of June 30, 2023 and December 31, 2022, respectively, under an accordion feature under the terms of the unsecured term loan facility. (2) Our unsecured term loan facility interest rate was calculated using a contractual rate of Adjusted SOFR plus a margin of 0.950% based on our credit rating as of June 30, 2023 and December 31, 2022. (3) Our undrawn facility fee is paid on a quarterly basis and is calculated based on the remaining borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of June 30, 2023 and December 31, 2022, $3.8 million and $4.5 million, respectively, of unamortized deferred financing costs remained to be amortized through the maturity date of our unsecured term loan facility. (4) The maturity date may be extended by two twelve-month periods, at the Company’s option.
Schedule of Debt Maturities	The following table summarizes the stated debt maturities and scheduled amortization payments for all outstanding debt as of June 30, 2023: Year (in thousands) Remaining 2023 $ 2,916 2024 (1) 781,006 2025 406,246 2026 401,317 2027 249,125 2028 400,000 Thereafter 2,200,000 Total aggregate principal value (2) $ 4,440,610 ________________________ (1) Includes the $350.0 million outstanding as of June 30, 2023 on the unsecured term loan facility maturing on October 3, 2024, for which the Company has two twelve-month extension options.
Schedule of Capitalized Interest and Loan Fees	The following table sets forth gross interest expense, including debt discount and deferred financing cost amortization, net of capitalized interest, for the three and six months ended June 30, 2023 and 2022. The interest expense capitalized was recorded as a cost of development and redevelopment and increased the carrying value of undeveloped land and construction in progress. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands) Gross interest expense $ 45,853 $ 39,612 $ 89,255 $ 79,336 Capitalized interest and deferred financing costs (19,470) (19,491) (37,201) (38,590) Interest expense $ 26,383 $ 20,121 $ 52,054 $ 40,746

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Share-Based Payment Award, Restricted Stock Units, Valuation Assumptions	The fair value of the portion of the award subject to the Market Condition was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below, which resulted in the following grant date fair value per share. Fair Value Assumptions Valuation date February 6, 2023 Fair value per share on valuation date (1) $40.10 Expected share price volatility 35.0% Risk-free interest rate 4.12% ________________________ (1) For one participant, the fair value per share on the valuation date for their 2023 Performance-Based RSUs is $40.43.

Rental Income and Future Mini_2

Rental Income and Future Minimum Rent (Tables)	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Schedule of Rental Income	The table below sets forth the allocation of rental income between fixed and variable payments and net collectability reversals or recoveries for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands) Fixed lease payments $ 235,329 $ 229,233 $ 481,164 $ 454,050 Variable lease payments 46,832 39,141 93,539 76,221 Net collectability (reversals) recoveries (1) (852) 202 (3,290) 1,513 Total rental income $ 281,309 $ 268,576 $ 571,413 $ 531,784 _____________________
Schedule of Future Contractual Minimum Rent Under Operating Lease	Future contractual minimum rent under operating leases, which includes amounts contractually due from leases that are on a cash basis of reporting due to creditworthiness considerations, as of June 30, 2023 for future periods is summarized as follows: Year Ending (in thousands) Remaining 2023 $ 404,358 2024 803,175 2025 788,631 2026 736,898 2027 672,448 2028 627,451 Thereafter 1,895,858 Total (1) $ 5,928,819 _____________________ (1) Excludes residential leases and leases with a term of one year or less.

Fair Value Measurements and D_2

Fair Value Measurements and Disclosures (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value of the Company's Marketable Securities	The following table sets forth the fair value of our marketable securities as of June 30, 2023 and December 31, 2022: Fair Value (Level 1) (1) June 30, 2023 December 31, 2022 Description (in thousands) Marketable securities (2) $ 25,786 $ 23,547 ________________________ (1) Based on quoted prices in active markets for identical securities. (2) The marketable securities are held in a limited rabbi trust.
Schedule of Carrying Value and Fair Value of Other Financial Instruments	The following table sets forth the carrying value and the fair value of our other financial instruments as of June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Carrying Fair (1) Carrying Fair (1) (in thousands) Liabilities Secured debt, net $ 240,142 $ 220,580 $ 242,938 $ 225,847 Unsecured debt, net $ 4,172,833 $ 3,551,407 $ 4,020,058 $ 3,500,420 ________________________ (1) Fair value calculated using Level 2 inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

Net Income Available to Commo_3

Net Income Available to Common Stockholders Per Share of the Company (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of Net Income Available to Common Stockholders	The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except share and per share amounts) Numerator: Net income available to common stockholders $ 55,587 $ 47,105 $ 112,195 $ 100,233 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common stockholders $ 55,261 $ 46,825 $ 111,505 $ 99,540 Denominator: Basic weighted average vested shares outstanding 117,154,946 116,822,234 117,107,402 116,736,706 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested shares and common stock equivalents outstanding 117,359,517 117,184,938 117,382,783 117,122,861 Basic earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________

Net Income Available to Commo_4

Net Income Available to Common Unitholders Per Unit of the Operating Partnership (Tables)	6 Months Ended
	Jun. 30, 2023
Net Income Available To Common Unitholders [Line Items]
Schedule of Net Income Available to Common Stockholders	The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except share and per share amounts) Numerator: Net income available to common stockholders $ 55,587 $ 47,105 $ 112,195 $ 100,233 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common stockholders $ 55,261 $ 46,825 $ 111,505 $ 99,540 Denominator: Basic weighted average vested shares outstanding 117,154,946 116,822,234 117,107,402 116,736,706 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested shares and common stock equivalents outstanding 117,359,517 117,184,938 117,382,783 117,122,861 Basic earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per share: Net income available to common stockholders per share $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________
Kilroy Realty L.P.
Net Income Available To Common Unitholders [Line Items]
Schedule of Net Income Available to Common Stockholders	The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in thousands, except unit and per unit amounts) Numerator: Net income available to common unitholders $ 56,124 $ 47,620 $ 113,292 $ 101,264 Allocation to participating securities (1) (326) (280) (690) (693) Numerator for basic and diluted net income available to common unitholders $ 55,798 $ 47,340 $ 112,602 $ 100,571 Denominator: Basic weighted average vested units outstanding 118,305,520 117,972,808 118,257,976 117,887,280 Effect of dilutive securities 204,571 362,704 275,381 386,155 Diluted weighted average vested units and common unit equivalents outstanding 118,510,091 118,335,512 118,533,357 118,273,435 Basic earnings per unit: Net income available to common unitholders per unit $ 0.47 $ 0.40 $ 0.95 $ 0.85 Diluted earnings per unit: Net income available to common unitholders per unit $ 0.47 $ 0.40 $ 0.95 $ 0.85 ________________________

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information of the Company (Tables)	6 Months Ended
	Jun. 30, 2023
Supplemental Cash Flow Elements [Abstract]
Schedule of Supplemental Cash Flows	Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 13) $ 64,438 $ 61,880
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information of the Operating Partnership (Tables)	6 Months Ended
	Jun. 30, 2023
Other Significant Noncash Transactions [Line Items]
Schedule of Supplemental Cash Flows	Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 13) $ 64,438 $ 61,880
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052
Kilroy Realty L.P.
Other Significant Noncash Transactions [Line Items]
Schedule of Supplemental Cash Flows	Supplemental cash flow information follows (in thousands): Six Months Ended June 30, 2023 2022 SUPPLEMENTAL CASH FLOWS INFORMATION: Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively $ 48,287 $ 39,703 Cash paid for amounts included in the measurement of ground lease liabilities $ 3,414 $ 3,253 NON-CASH INVESTING TRANSACTIONS: Accrual for expenditures for operating properties and development and redevelopment properties $ 90,277 $ 62,443 Tenant improvements funded directly by tenants $ 8,033 $ 7,210 NON-CASH FINANCING TRANSACTIONS: Accrual of distributions payable to common unitholders (Note 13) $ 64,438 $ 61,880
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash	The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (in thousands) RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH: Cash and cash equivalents at beginning of period $ 347,379 $ 414,077 Restricted cash at beginning of period — 13,006 Cash and cash equivalents and restricted cash at beginning of period $ 347,379 $ 427,083 Cash and cash equivalents at end of period $ 361,885 $ 210,044 Restricted cash at end of period — 13,008 Cash and cash equivalents and restricted cash at end of period $ 361,885 $ 223,052

Organization, Ownership and B_4

Organization, Ownership and Basis of Presentation - Operating Properties (Details)	6 Months Ended
	Jun. 30, 2023 ft² property project tenant building
Stabilized Office Properties
Real Estate Properties [Line Items]
Number of Buildings | building	119
Rentable Square Feet	16,214,594
Number of Tenants | tenant	401
Percentage Occupied	86.60%
Percentage Leased	88.60%
Stabilized Residential Properties
Real Estate Properties [Line Items]
Number of Projects | property	3
Number of Units | property	1,001
2023 Average Occupancy	93%
In-process development projects - tenant improvement
Real Estate Properties [Line Items]
Rentable Square Feet	805,000
Number of Projects | project	2
In-process development projects - under construction
Real Estate Properties [Line Items]
Rentable Square Feet	875,000
Number of Projects | project	1
In-process redevelopment projects - under construction
Real Estate Properties [Line Items]
Rentable Square Feet	100,000
Number of Projects | project	2

Organization, Ownership and B_5

Organization, Ownership and Basis of Presentation - Narrative (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) a property_partnership property variableInterestEntity development_site	Jun. 30, 2022	Dec. 31, 2022 USD ($) variableInterestEntity
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Lease-up properties occupancy percentage	95%
Lease-up properties occupancy duration	1 year
Assets	$ 10,911,034		$ 10,796,987
Liabilities	5,243,440		5,122,026
Noncontrolling interest in VIE	$ 180,142		$ 184,390
Variable Interest Entity, Primary Beneficiary
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of VIEs | variableInterestEntity	2		2
Assets	$ 423,000		$ 438,700
Liabilities	25,900		31,500
Variable Interest Entity, Primary Beneficiary | Real Estate Investment
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Assets	$ 354,700		362,700
San Francisco, California
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | property	1
101 First LLC and 303 Second LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Company owned general partnership interest	56%
101 First LLC and 303 Second LLC | Variable Interest Entity, Primary Beneficiary
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Noncontrolling interest in VIE	$ 175,400		$ 179,400
Redwood LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Company owned general partnership interest	93%
Redwood LLC | Redwood City, California
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | property	2
Operating Partnership
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership interest (percent)	99%	99%	99%
Operating Partnership | Non-Affiliated Investors and Certain Executive Officer and Directors
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership interest (percent)	1%	1%	1%
Future Development Site
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of future development sites | development_site	8
Area of undeveloped land | a	64
Stabilized Office Properties | Washington
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | property	10
Future Development Project | Washington
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | development_site	1
Future Development Project | Texas
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | development_site	1
Development Project In The Tenant Improvement Phase | Texas
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | development_site	1
Properties And Development Projects
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property ownership percentage	100%
Office Properties Owned By Consolidated Property Partnerships
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of properties | property	4
Consolidated Property Partnerships
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of property partnerships | property_partnership	3
Consolidated Property Partnerships Owning Office Properties Through REITs | 101 First LLC and 303 Second LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of property partnerships | property_partnership	2

Prepaid Expenses and Other As_3

Prepaid Expenses and Other Assets, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Furniture, fixtures and other long-lived assets, net	$ 40,639	$ 41,538
Prepaid expenses and deferred financing costs, net	23,442	11,364
Other assets	11,507	9,527
Total prepaid expenses and other assets, net	$ 75,588	$ 62,429

Secured and Unsecured Debt of_3

Secured and Unsecured Debt of the Operating Partnership - Unsecured Senior Notes, Unsecured Revolving Credit Facility and Term Loan Facility (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) extension_option	Dec. 31, 2022 USD ($) extension_option	Aug. 01, 2023 USD ($)
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Reduction interest rate	0.01%	0.01%
Kilroy Realty L.P. | Revolving Credit Facility and Term Loan Facility | Adjusted SOFR
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Variable rate (percent)	0.10%	0.10%
Kilroy Realty L.P. | Revolving Credit Facility
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Outstanding borrowings	$ 0	$ 0
Remaining borrowing capacity	1,100,000,000	1,100,000,000
Total borrowing capacity	$ 1,100,000,000	$ 1,100,000,000
Interest rate (percent)	6.09%	5.20%
Facility fee-annual rate (percent)	0.20%	0.20%
Contingent additional borrowings	$ 500,000,000	$ 500,000,000
Unamortized deferred financing costs	$ 4,300,000	$ 5,300,000
Number of extension options | extension_option	2	2
Extension period (in months)	6 months	6 months
Kilroy Realty L.P. | Revolving Credit Facility | Subsequent Event
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Outstanding letters of credit			$ 5,200,000
Kilroy Realty L.P. | Revolving Credit Facility | SOFR
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Variable rate (percent)	0.90%	0.90%
Kilroy Realty L.P. | Term Loan Facility | Unsecured Term Loan Facility
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Outstanding borrowings	$ 350,000,000	$ 200,000,000
Remaining borrowing capacity	170,000,000	200,000,000
Total borrowing capacity	$ 520,000,000	$ 400,000,000
Interest rate (percent)	6.17%	5.23%
Facility fee-annual rate (percent)	0.20%	0.20%
Contingent additional borrowings	$ 130,000,000	$ 100,000,000
Unamortized deferred financing costs	$ 3,800,000	$ 4,500,000
Number of extension options | extension_option	2
Extension period (in months)	12 months
Kilroy Realty L.P. | Term Loan Facility | SOFR | Unsecured Term Loan Facility
Terms of the Unsecured Revolving Credit Facility and Term Loan Facility
Variable rate (percent)	0.95%	0.95%

Secured and Unsecured Debt of_4

Secured and Unsecured Debt of the Operating Partnership - Additional Information (Details) - USD ($)	Jun. 30, 2023	Mar. 31, 2023	Jan. 31, 2023	Dec. 31, 2022
Term Loan
Debt Instrument [Line Items]
Term loan facility, additional borrowing capacity			$ 100,000,000
Term loan facility, maximum borrowing capacity			$ 650,000,000
Term loan facility, accordion feature for additional term loan commitments		$ 20,000,000
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
Kilroy Realty L.P. | Term Loan Facility | Unsecured Term Loan Facility
Debt Instrument [Line Items]
Term loan facility, maximum borrowing capacity	$ 520,000,000			$ 400,000,000

Secured and Unsecured Debt of_5

Secured and Unsecured Debt of the Operating Partnership - Debt Maturities (Details) - Kilroy Realty L.P. $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) extension_option
Stated debt maturities and scheduled amortization payments
Remaining 2023	$ 2,916
2024	781,006
2025	406,246
2026	401,317
2027	249,125
2028	400,000
Thereafter	2,200,000
Total aggregate principal value	4,440,610
Unsecured Debt | Unsecured Term Loan Facility
Stated debt maturities and scheduled amortization payments
Long-term debt	$ 350,000
Number of extension options | extension_option	2
Extension period (in months)	12 months
Unsecured Senior Notes
Stated debt maturities and scheduled amortization payments
Unamortized debt issuance expense	$ 21,800
Senior Notes
Stated debt maturities and scheduled amortization payments
Debt issuance discount	$ 5,800

Secured and Unsecured Debt of_6

Secured and Unsecured Debt of the Operating Partnership - Capitalized Interest and Loan Fees (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Capitalized Interest and Loan Fees [Line Items]
Interest expense	$ 26,383	$ 20,121	$ 52,054	$ 40,746
Kilroy Realty L.P.
Capitalized Interest and Loan Fees [Line Items]
Gross interest expense	45,853	39,612	89,255	79,336
Capitalized interest and deferred financing costs	(19,470)	(19,491)	(37,201)	(38,590)
Interest expense	$ 26,383	$ 20,121	$ 52,054	$ 40,746

Noncontrolling Interests on t_2

Noncontrolling Interests on the Company's Consolidated Financial Statements (Details) $ / shares in Units, $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) trading_day $ / shares shares	Jun. 30, 2022 shares	Dec. 31, 2022 USD ($) trading_day $ / shares shares
Noncontrolling Interest [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01		$ 0.01
Number of trading days | trading_day	10		10
Aggregate value upon redemption of outstanding noncontrolling common units | $	$ 34.4		$ 44.7
Non-Affiliated Investors and Certain Executive Officer and Directors | Common Units
Noncontrolling Interest [Line Items]
Common units outstanding held by common limited partners (in shares)	1,150,574	1,150,574	1,150,574
Kilroy Realty L.P. | Common Units
Noncontrolling Interest [Line Items]
Conversion ratio	1		1
Kilroy Realty L.P. | Common Units
Noncontrolling Interest [Line Items]
Common units outstanding held by common limited partners (in shares)	1,150,574		1,150,574
Operating Partnership
Noncontrolling Interest [Line Items]
Ownership interest (percent)	99%	99%	99%
Operating Partnership | Non-Affiliated Investors and Certain Executive Officer and Directors
Noncontrolling Interest [Line Items]
Ownership interest (percent)	1%	1%	1%

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 06, 2023 USD ($) installment $ / shares shares	Feb. 28, 2023 shares	Jun. 30, 2023 USD ($) compensation_plan shares	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) compensation_plan shares	Jun. 30, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based incentive compensation plans | compensation_plan			1		1
Effective registration shares (in shares) | shares			12,600,000		12,600,000
Number of shares available for grant (in shares) | shares			2,900,000		2,900,000
Share-based compensation expense			$ 9.5	$ 9.7	$ 21	$ 16.3
Share-based compensation expense capitalized			1.8	$ 1.7	3.3	$ 3
Share-based compensation not yet recognized			$ 34.1		$ 34.1
Share-based compensation not yet recognized period of recognition			1 year 3 months 18 days
2022 Performance Based RSUs, Debt to EBITDA Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based RSU, achievement target, all other participants, percent			150%		150%
Performance-based RSU, achievement target, CEO, percent			175%		175%
Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) | shares		300,007
Time-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) | shares		217,059
Number of installments | installment	3
Right to receive number of shares (in shares) | shares	1
Time-Based Restricted Stock Units (RSUs), Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value RSUs granted	$ 8.6
Share price (in dollars per share) | $ / shares	$ 39.65
2021 Performance Based RSUs, Debt to EBITDA Ratio Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based RSU, achievement target, all other participants, percent			150%		150%
Performance-based RSU, achievement target, CEO, percent			175%		175%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted in period (in shares) | shares		517,066
2023 Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Vesting, achievement of pre-set FFO per share goals, percentage of RSUs		100%
Vesting, Average debt to EBIDTA ratio, percentage of RSUs		50%
Vesting, Market measure, percentage of RSUs		50%
Share-based compensation expense					$ 4.2
Number of shares issuable per RSU		1
Fair value RSUs granted	$ 12
2023 Performance Based RSUs, FFO Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based RSU, achievement target, all other participants, percent					111%
Performance-based RSU, achievement target, CEO, percent					116.50%
2023 Performance Based RSUs, Debt to EBITDA Ratio Performance Condition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based RSU, achievement target, all other participants, percent					100%
Performance-based RSU, achievement target, CEO, percent					175%
CEO and Former President
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense related to accelerated			$ 5.4		$ 13.2

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value Assumptions (Details) - 2023 Performance-Based RSUs	Feb. 06, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per share on valuation date (in dollars per share)	$ 40.10
Expected share price volatility	35%
Risk-free interest rate	4.12%
One Participant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per share on valuation date (in dollars per share)	$ 40.43

Rental Income and Future Mini_3

Rental Income and Future Minimum Rent - Rental income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Leases [Abstract]
Fixed lease payments	$ 235,329	$ 229,233	$ 481,164	$ 454,050
Variable lease payments	46,832	39,141	93,539	76,221
Net collectability (reversals) recoveries	(852)	202	(3,290)	1,513
Total rental income	$ 281,309	$ 268,576	$ 571,413	$ 531,784

Rental Income and Future Mini_4

Rental Income and Future Minimum Rent - Future Contractual Minimum Rent (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Future contractual minimum rent under operating lease
Remaining 2023	$ 404,358
2024	803,175
2025	788,631
2026	736,898
2027	672,448
2028	627,451
Thereafter	1,895,858
Total	$ 5,928,819

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) $ in Millions	Jun. 30, 2023 USD ($)
Long-term Purchase Commitment [Line Items]
Commitments for contracts and executed leases directly related to operating and development properties	$ 497.5
Environmental Matters
Long-term Purchase Commitment [Line Items]
Accrued environmental remediation liabilities	$ 76.3

Fair Value Measurements and D_3

Fair Value Measurements and Disclosures - Assets and Liabilities Reported at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair value, Measurements, Recurring | Fair Value (Level 1)
Assets and Liabilities Reported at Fair Value
Marketable securities	$ 25,786	$ 23,547

Fair Value Measurements and D_4

Fair Value Measurements and Disclosures - Financial Instruments Disclosed at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Carrying Value | Secured debt, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of debt, net	$ 240,142	$ 242,938
Carrying Value | Unsecured debt, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of debt, net	4,172,833	4,020,058
Fair Value | Secured debt, net | Fair value (level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of debt, net	220,580	225,847
Fair Value | Unsecured debt, net | Fair value (level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of debt, net	$ 3,551,407	$ 3,500,420

Net Income Available to Commo_5

Net Income Available to Common Stockholders Per Share of the Company (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income available to common stockholders	$ 55,587	$ 47,105	$ 112,195	$ 100,233
Allocation to participating securities	(326)	(280)	(690)	(693)
Numerator for basic and diluted net income available to common stockholders	$ 55,261	$ 46,825	$ 111,505	$ 99,540
Denominator:
Basic weighted average vested shares outstanding (in shares)	117,154,946	116,822,234	117,107,402	116,736,706
Effect of dilutive securities (in shares)	204,571	362,704	275,381	386,155
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares)	117,359,517	117,184,938	117,382,783	117,122,861
Basic earnings per share:
Net income available to common stockholders per share (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Diluted earnings per share:
Net income available to common stockholders per share (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85

Net Income Available to Commo_6

Net Income Available to Common Unitholders Per Unit of the Operating Partnership (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income available to common unitholders	$ 55,587	$ 47,105	$ 112,195	$ 100,233
Allocation to participating securities	(326)	(280)	(690)	(693)
Numerator for basic and diluted net income available to common stockholders	$ 55,261	$ 46,825	$ 111,505	$ 99,540
Denominator:
Basic weighted average vested units outstanding (in shares)	117,154,946	116,822,234	117,107,402	116,736,706
Effect of dilutive securities (in shares)	204,571	362,704	275,381	386,155
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares)	117,359,517	117,184,938	117,382,783	117,122,861
Basic earnings per unit:
Net income available to common unitholders per unit (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Diluted earnings per unit:
Net income available to common unitholders per unit (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Kilroy Realty L.P.
Numerator:
Net income available to common unitholders	$ 56,124	$ 47,620	$ 113,292	$ 101,264
Allocation to participating securities	(326)	(280)	(690)	(693)
Numerator for basic and diluted net income available to common stockholders	$ 55,798	$ 47,340	$ 112,602	$ 100,571
Denominator:
Basic weighted average vested units outstanding (in shares)	118,305,520	117,972,808	118,257,976	117,887,280
Effect of dilutive securities (in shares)	204,571	362,704	275,381	386,155
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares)	118,510,091	118,335,512	118,533,357	118,273,435
Basic earnings per unit:
Net income available to common unitholders per unit (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85
Diluted earnings per unit:
Net income available to common unitholders per unit (in dollars per share)	$ 0.47	$ 0.40	$ 0.95	$ 0.85

Supplemental Cash Flow Inform_5

Supplemental Cash Flow Information of the Company - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
SUPPLEMENTAL CASH FLOWS INFORMATION:
Capitalized interest	$ 34,716	$ 36,476
Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively	48,287	39,703
Cash paid for amounts included in the measurement of ground lease liabilities	3,414	3,253
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	90,277	62,443
Tenant improvements funded directly by tenants	8,033	7,210
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 13)	$ 64,438	$ 61,880

Supplemental Cash Flow Inform_6

Supplemental Cash Flow Information of the Company - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	$ 361,885	$ 347,379	$ 210,044	$ 414,077
Restricted cash	0	0	13,008	13,006
Cash and cash equivalents and restricted cash	$ 361,885	$ 347,379	$ 223,052	$ 427,083

Supplemental Cash Flow Inform_7

Supplemental Cash Flow Information of the Operating Partnership - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
SUPPLEMENTAL CASH FLOWS INFORMATION:
Capitalized interest	$ 34,716	$ 36,476
Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively	48,287	39,703
Cash paid for amounts included in the measurement of ground lease liabilities	3,414	3,253
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	90,277	62,443
Tenant improvements funded directly by tenants	8,033	7,210
NON-CASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders (Note 13)	64,438	61,880
Kilroy Realty L.P.
SUPPLEMENTAL CASH FLOWS INFORMATION:
Capitalized interest	34,716	36,476
Cash paid for interest, net of capitalized interest of $34,716 and $36,476 as of June 30, 2023 and 2022, respectively	48,287	39,703
Cash paid for amounts included in the measurement of ground lease liabilities	3,414	3,253
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	90,277	62,443
Tenant improvements funded directly by tenants	8,033	7,210
NON-CASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders (Note 13)	$ 64,438	$ 61,880

Supplemental Cash Flow Inform_8

Supplemental Cash Flow Information of the Operating Partnership - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	$ 361,885	$ 347,379	$ 210,044	$ 414,077
Restricted cash	0	0	13,008	13,006
Cash and cash equivalents and restricted cash	361,885	347,379	223,052	427,083
Kilroy Realty L.P.
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents	361,885	347,379	210,044	414,077
Restricted cash	0	0	13,008	13,006
Cash and cash equivalents and restricted cash	$ 361,885	$ 347,379	$ 223,052	$ 427,083

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event $ in Millions	Jul. 12, 2023 USD ($)	Jul. 20, 2023 USD ($) ft² apartmentUnit officeBuilding
Subsequent Event [Line Items]
Payment of dividends	$ 64.4
Kilroy Realty L.P. | Mortgages
Subsequent Event [Line Items]
Long term debt		$ 375
Number of Office Buildings | officeBuilding		2
Number of apartment units | apartmentUnit		608
Square feet of retail space | ft²		95,000
Percentage bearing fixed interest rate		5.90%