Debt and Other Financing Arrangements - Financing Arrangements (Details) $ in Millions	6 Months Ended
Jun. 30, 2019 USD ($)
Debt Instrument [Line Items]
Available	$ 1,400
Letters of Credit	20
Tenneco Inc. revolving credit agreement
Debt Instrument [Line Items]
Available	1,200
Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Available	0
Tenneco Inc. Term Loan B
Debt Instrument [Line Items]
Available	0
Subsidiaries’ credit agreements
Debt Instrument [Line Items]
Available	$ 200

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant