Summary of Accounting Policies - Net Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance, beginning	$ 60	$ 65
Translation adjustments	(3)	(5)
Balance, ending	57	60
Clean Air Division \| North America
Goodwill [Roll Forward]
Balance, beginning	14	14
Translation adjustments	0	0
Balance, ending	14	14
Clean Air Division \| Europe, South America & India
Goodwill [Roll Forward]
Balance, beginning	11	12
Translation adjustments	0	(1)
Balance, ending	11	11
Clean Air Division \| Asia Pacific
Goodwill [Roll Forward]
Balance, beginning	0	0
Translation adjustments	0	0
Balance, ending	0	0
Ride Performance Division \| North America
Goodwill [Roll Forward]
Balance, beginning	10	10
Translation adjustments	0	0
Balance, ending	10	10
Ride Performance Division \| Europe, South America & India
Goodwill [Roll Forward]
Balance, beginning	25	29
Translation adjustments	(3)	(4)
Balance, ending	22	25
Ride Performance Division \| Asia Pacific
Goodwill [Roll Forward]
Balance, beginning	0	0
Translation adjustments	0	0
Balance, ending	$ 0	$ 0

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a,h)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ten_CleanAirDivisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_NorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=ten_EuropeSouthAmericaAndIndiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_AsiaPacificMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ten_RidePerformanceDivisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: