Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Aug. 10, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	000-53649
Entity Registrant Name	KBS REAL ESTATE INVESTMENT TRUST II, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	26-0658752
Entity Address, Address Line One	800 Newport Center Drive, Suite 700
Entity Address, City or Town	Newport Beach,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92660
City Area Code	949
Local Phone Number	417-6500
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 Common Stock, Shares Outstanding		184,710,255
Entity Central Index Key	0001411059
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false