XML 103 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information Document (USD $)
12 Months Ended
Dec. 31, 2012
Feb. 11, 2013
Jun. 30, 2012
Entity Information [Line Items]      
Entity Registrant Name KILROY REALTY CORP    
Entity Central Index Key 0001025996    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q4    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   74,895,990  
Entity Public Float     $ 2,382,187,648
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Kilroy Realty, L.P. [Member]
     
Entity Information [Line Items]      
Entity Registrant Name Kilroy Realty, L.P.    
Entity Central Index Key 0001493976    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q4    
Amendment Flag false    
Entity Public Float     $ 12,415,519
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes