Commitments and Contingencies - Other Legal Proceedings, Claims and Investigations (Details)	9 Months Ended
Sep. 30, 2016 case
United States
Loss Contingencies [Line Items]
Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories	500
Europe
Loss Contingencies [Line Items]
Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories	50

Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories.

No definition available.

Name:	ten_CurrentDocketOfActiveAndInactiveCasesNationwideRelatingToAllegedExposureToAsbestosFromOurProductCategories
Namespace Prefix:	ten_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration