XML 58 R47.htm IDEA: XBRL DOCUMENT v3.20.1
Partners' Capital of the Operating Partnership (Details) - shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Operating Partnership [Member]      
General Partners' Capital Account [Abstract]      
Ownership interest 98.30% 98.00% 98.10%
Kilroy Realty L.P. [Member] | Common units [Member]      
General Partners' Capital Account [Abstract]      
Company owned common units in the Operating Partnership 115,067,924 100,967,024 106,016,287
Noncontrolling common units of the Operating Partnership 2,021,287   2,023,287
Non-affiliated investors and certain of our executive officers and directors [Member] | Operating Partnership [Member]      
General Partners' Capital Account [Abstract]      
Ownership interest 1.70% 2.00% 1.90%
Non-affiliated investors and certain of our executive officers and directors [Member] | Common units [Member]      
General Partners' Capital Account [Abstract]      
Noncontrolling common units of the Operating Partnership 2,021,287 2,023,287 2,023,287