Cover - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-34063
Entity Registrant Name	LendingTree, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-2414818
Entity Address, Address Line One	1415 Vantage Park Dr.
Entity Address, Address Line Two	Suite 700
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28203
City Area Code	704
Local Phone Number	541-5351
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	TREE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		13,002,786
Entity Central Index Key	0001434621
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3