COVER PAGE - shares	6 Months Ended
	Jun. 30, 2020	Aug. 05, 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	001-35098
Entity Registrant Name	Cornerstone OnDemand, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-4068197
Entity Address, Address Line One	1601 Cloverfield Blvd.
Entity Address, Address Line Two	Suite 620 South
Entity Address, City or Town	Santa Monica
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90404
City Area Code	(310)
Local Phone Number	752-0200
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	CSOD
Security Exchange Name	NASDAQ
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		64,341,208
Amendment Flag	false
Entity Central Index Key	0001401680
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31