Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 19, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-26224
Entity Registrant Name	INTEGRA LIFESCIENCES HOLDINGS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0317849
Entity Address, Address Line One	1100 Campus Road
Entity Address, Postal Zip Code	08540
Entity Address, City or Town	Princeton
Entity Address, State or Province	NJ
City Area Code	609
Local Phone Number	275-0500
Title of 12(b) Security	Common Stock, Par Value $.01 Per Share
Trading Symbol	IART
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Shell Company	false
Entity Public Float			$ 3,370.2
Entity Common Stock, Shares Outstanding (in shares)		84,369,946
Documents Incorporated by Reference	Certain portions of the registrant’s definitive proxy statement relating to its scheduled May 14, 2021 Annual Meeting of Stockholders are incorporated by reference in Part III of this report.
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0000917520