Amount for accounts payable to related parties.

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

- Definition

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(3))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 5: 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(3)(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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.

+ References

No definition available.

+ Details

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

- Definition

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

No definition available.

+ Details

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

- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=114873854&loc=SL114874292-224272

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

Name:	us-gaap_RevenueFromRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_IcahnAutomotiveGroupLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_PSCMetalsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_AnqingTPGoetzePistonRingCompanyLimitedChinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_AnqingTPPowderMetallurgyCo.LtdChinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_DongsuhFederalMogulIndustrialCo.Ltd.KoreaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FederalMogulPowertrainOtomotivA.S.TurkeyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FederalMogulTPLinerEuropeOtomotivLtd.Sti.TurkeyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FederalMogulIzmitPistonvePimUretimTesisleriA.S.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FederalMogulTPLinersInc.USAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FrenosHidraulicosAutomotricesS.A.deC.V.MexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_FarlocArgentinaSAICYFArgentinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ten_MontagewerkAbgastechnikEmdenGmbHGermanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Net Sales	$ 0	$ 0	$ 0	$ 0
Icahn Automotive Group LLC
Related Party Transaction [Line Items]
Net Sales	47		90
Purchases	0		0
Royalty and Other Income	1		2
Receivables	54		54		$ 60
Payables and accruals	2		2		12
PSC Metals, Inc.
Related Party Transaction [Line Items]
Net Sales	0		1
Purchases	0		0
Royalty and Other Income	0		0
Anqing TP Goetze Piston Ring Company Limited
Related Party Transaction [Line Items]
Net Sales	0		0
Purchases	15		29
Royalty and Other Income	1		0
Receivables	2		2		1
Payables and accruals	22		22		22
Anqing TP Powder Metallurgy Company Limited
Related Party Transaction [Line Items]
Net Sales	1		1
Purchases	2		3
Royalty and Other Income	0		0
Receivables	0		0		1
Payables and accruals	1		1		1
Dongsuh Federal-Mogul Industrial Co., Ltd.
Related Party Transaction [Line Items]
Net Sales	2		3
Purchases	5		7
Royalty and Other Income	0		0
Receivables	0		0		1
Payables and accruals	2		2		2
Federal-Mogul Powertrain Otomotiv A.S.
Related Party Transaction [Line Items]
Net Sales	15		42
Purchases	49		104
Royalty and Other Income	1		2
Receivables	12		12		9
Payables and accruals	27		27		16
Federal-Mogul TP Liner Europe Otomotiv Ltd. Sti.
Related Party Transaction [Line Items]
Net Sales	0		0
Purchases	2		5
Royalty and Other Income	0		0
Receivables	0		0		0
Payables and accruals	1		1		1
Federal-Mogul Izmit Piston ve Pim Uretim Tesisleri A.S.
Related Party Transaction [Line Items]
Net Sales	1		2
Purchases	4		8
Royalty and Other Income	0		0
Receivables	0		0		0
Payables and accruals	3		3		0
Federal-Mogul TP Liners, Inc.
Related Party Transaction [Line Items]
Net Sales	4		8
Purchases	0		0
Royalty and Other Income	1		1
Receivables	2		2		2
Payables and accruals	7		7		7
Frenos Hidraulicos Auto
Related Party Transaction [Line Items]
Net Sales	1		1
Purchases	0		0
Royalty and Other Income	0		0
Farloc Argentina SAIC
Related Party Transaction [Line Items]
Receivables	1		1		0
Payables and accruals	1		1		0
Montagewerk Abgastechnik Emden GmbH
Related Party Transaction [Line Items]
Net Sales	0		2
Purchases	0		0
Royalty and Other Income	0		0
Receivables	0		0		0
Payables and accruals	$ 0		$ 0		$ 0