Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 26, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	1-12387
Entity Registrant Name	TENNECO INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0515284
Entity Address, Address Line One	7450 N McCormick Blvd
Entity Address, City or Town	Skokie
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60076
City Area Code	847
Local Phone Number	482-5000
Title of 12(b) Security	Class A Voting Common Stock, par value $0.01 per share
Trading Symbol	TEN
Security Exchange Name	NYSE
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		83,492,328
Entity Central Index Key	0001024725
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false