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- Financing Arrangements (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Long-term debt $ 1,069us-gaap_LongTermDebtNoncurrent $ 1,019us-gaap_LongTermDebtNoncurrent
Committed Credit Facilities, Commitments 1,652us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity [1]  
Committed Credit Facilities, Borrowings 404us-gaap_SecuredDebt [1]  
Committed Credit Facilities, Letter of Credit 34ten_LineOfCreditFacilityLettersOfCreditOutstanding [1],[2]  
Committed Credit Facilities, Available 1,214us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity [1]  
Tenneco Inc. revolving credit agreement    
Debt Instrument [Line Items]    
Committed Credit Facilities, Term 2019 [1]  
Committed Credit Facilities, Commitments 1,200us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= ten_RevolvingCreditAgreementMember		 [1]  
Committed Credit Facilities, Borrowings 0us-gaap_SecuredDebt
/ us-gaap_LongtermDebtTypeAxis
= ten_RevolvingCreditAgreementMember		 [1]  
Committed Credit Facilities, Letter of Credit 34ten_LineOfCreditFacilityLettersOfCreditOutstanding
/ us-gaap_LongtermDebtTypeAxis
= ten_RevolvingCreditAgreementMember		 [1],[2]  
Committed Credit Facilities, Available 1,166us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= ten_RevolvingCreditAgreementMember		 [1]  
Tranche A Term Facility    
Debt Instrument [Line Items]    
Committed Credit Facilities, Term 2019 [1]  
Committed Credit Facilities, Commitments 300us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= ten_TrancheAMember		 [1]  
Committed Credit Facilities, Borrowings 300us-gaap_SecuredDebt
/ us-gaap_LongtermDebtTypeAxis
= ten_TrancheAMember		 [1]  
Notes due 2015 through 2026    
Debt Instrument [Line Items]    
Unsecured Debt 8us-gaap_UnsecuredDebt
/ us-gaap_LongtermDebtTypeAxis
= ten_NotesDueTwoThousandFourteenThroughTwoThousandTwentySixMember		 9us-gaap_UnsecuredDebt
/ us-gaap_LongtermDebtTypeAxis
= ten_NotesDueTwoThousandFourteenThroughTwoThousandTwentySixMember
Subsidiaries' credit agreements    
Debt Instrument [Line Items]    
Committed Credit Facilities, Commitments 152us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= ten_SubsidiariesCreditAgreementMember		 [1]  
Committed Credit Facilities, Borrowings 104us-gaap_SecuredDebt
/ us-gaap_LongtermDebtTypeAxis
= ten_SubsidiariesCreditAgreementMember		 [1]  
Committed Credit Facilities, Available $ 48us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= ten_SubsidiariesCreditAgreementMember		 [1]  
Subsidiaries' credit agreements | Minimum    
Debt Instrument [Line Items]    
Committed Credit Facilities, Term 2015 [1]  
Subsidiaries' credit agreements | Maximum    
Debt Instrument [Line Items]    
Committed Credit Facilities, Term 2026 [1]  
[1] We generally are required to pay commitment fees on the unused portion of the total commitment.
[2] Letters of credit reduce the available borrowings under the revolving credit agreement.