Guarantees (Details Textual) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Guarantor Obligations [Line Items]
Line of credit facility letters of credit outstanding	$ 54
Guarantees (Textual) [Abstract]
Maximum percentage of stock of certain first-tier foreign subsidiaries pledged to secure senior credit Facility	66.00%
Maximum amount payable for pension performance guarantees	25
Percentage of liability considered to determine maximum amount payable for pension performance guarantees	105.00%
Percentage of the pension obligation recognized for participating employers	100.00%
Pension obligation of participating employers recognized on the balance sheet	6	9
Maximum amount reimbursable to guarantor	4
Negotiable financial instruments collected before maturity date and sold at discount	1	6
Negotiable financial instruments not redeemed and used for vendor payment	19	8
Negotiable financial instruments received from OE customer not redeemed	11	11
Negotiable financial instruments received, classified as other current assets	$ 11	$ 11

Guarantees.

Name:	ten_GuaranteesTextualAbstract
Namespace Prefix:	ten
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility letters of credit outstanding.

+ Details

Name:	ten_LineOfCreditFacilitiesLettersOfCreditOutstanding
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum amount payable for pension performance guarantees.

+ Details

Name:	ten_MaximumAmountPayableForPensionPerformanceGuarantees
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum amount reimbursable to guarantor.

+ Details

Name:	ten_MaximumAmountReimbursableToGuarantor
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum percentage of stock of certain first-tier foreign subsidiaries pledged to secure senior credit facility.

+ Details

Name:	ten_MaximumPercentageOfStockOfCertainFirstTierForeignSubsidiariesPledgedToSecureSeniorCreditFacility
Namespace Prefix:	ten
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Negotiable financial instruments collected before maturity date and sold at discount.

+ Details

Name:	ten_NegotiableFinancialInstrumentsCollectedBeforeMaturityDateAndSoldAtDiscount
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Negotiable financial instruments not redeemed and used for vendor payment.

+ Details

Name:	ten_NegotiableFinancialInstrumentsNotRedeemedAndUsedForVendorPayment
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Negotiable financial instruments received classified as other current assets.

+ Details

Name:	ten_NegotiableFinancialInstrumentsReceivedClassifiedAsOtherCurrentAssets
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Negotiable financial instruments received from OE customer not redeemed.

+ Details

Name:	ten_NegotiableFinancialInstrumentsReceivedFromOeCustomerNotRedeemed
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Pension obligation of participating employers recognized on the balance sheet.

+ Details

Name:	ten_PensionObligationOfParticipatingEmployersRecognizedOnBalanceSheet
Namespace Prefix:	ten
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of liability considered to determine maximum amount payable for pension performance guarantees.

+ Details

Name:	ten_PercentageOfLiabilityConsideredToDetermineMaximumAmountPayableForPensionPerformanceGuarantees
Namespace Prefix:	ten
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of the pension obligation recognized for participating employers.

+ Details

Name:	ten_PercentageOfPensionObligationRecognizedForParticipatingEmployers
Namespace Prefix:	ten
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration