Long Term Debt, Maturities, Repayments Of Principal

No definition available.

Name:	ten_LongTermDebtMaturitiesRepaymentsOfPrincipal
Namespace Prefix:	ten_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt, Maturities, Repayments Of Principal, Quarterly Installments

+ References

No definition available.

+ Details

Name:	ten_LongTermDebtMaturitiesRepaymentsOfPrincipalQuarterlyInstallments
Namespace Prefix:	ten_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ten_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ten_TermLoanADue2019Through2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ten_A2.75TermLoanBDue2019Through2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ten_EuroFloatingRatesDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ten_PrincipalPaymentInstallmentAxis=ten_InstallmentOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ten_PrincipalPaymentInstallmentAxis=ten_InstallmentTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ten_PrincipalPaymentInstallmentAxis=ten_InstallmentThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt and Other Financing Arrangements - Additional Information (Details)	2 Months Ended	12 Months Ended
	Mar. 14, 2019 USD ($)	Dec. 31, 2018 USD ($) quarterly_installment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Long term debt maturities within the next twelve months		$ 175
Borrowings on revolving lines of credit		$ 5,149,000,000	$ 6,664,000,000	$ 5,417,000,000
Term Loan \| Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments \| quarterly_installment		19
Long term debt maturities within the next twelve months		$ 85,000,000
Term Loan \| Tenneco Inc. Term Loan B
Debt Instrument [Line Items]
Quarterly installments \| quarterly_installment		27
Repayments of principal percentage		400.00%
Long term debt maturities within the next twelve months		$ 17,000,000
Senior Notes \| Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Variable rate		0.00%
Installment One \| Term Loan \| Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments \| quarterly_installment		7
Principal payment		$ 21,000,000
Installment Two \| Term Loan \| Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments \| quarterly_installment		4
Principal payment		$ 32,000,000
Installment Three \| Term Loan \| Tenneco Inc. Term Loan A
Debt Instrument [Line Items]
Quarterly installments \| quarterly_installment		8
Principal payment		$ 43,000,000
LIBOR \| Senior Notes \| Euro Floating Rate Notes due 2024
Debt Instrument [Line Items]
Variable rate		4.875%
Subsequent event
Debt Instrument [Line Items]
Borrowings on revolving lines of credit	$ 102,000,000