Document and Entity Information $ in Billions	12 Months Ended
	Dec. 31, 2019 USD ($) shares
Document and Entity Information [Abstract]
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Entity Registrant Name	GLOBUS MEDICAL, INC.
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding | shares	99,835,463
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Class A Common Stock, par value $.001 per share
Trading Symbol	GMED
Security Exchange Name	NYSE
Entity File Number	001-35621
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3744954
Entity Address, Address Line One	2560 General Armistead Avenue
Entity Address, City or Town	Audubon
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19403
City Area Code	610
Local Phone Number	930-1800
Document Annual Report	true
Document Transition Report	false
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001237831
Current Fiscal Year End Date	--12-31
EntityPublicFloat | $	$ 3.3
Entity Well Known Seasoned Issuer	No
Entity Voluntary Filers	No