Restructuring Charges, Net and Asset Impairments - Incurred Costs (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		$ 48	$ 119	$ 113
Asset impairments related to restructuring actions		2	29	3
Other non-restructuring asset impairments		9	472	2
Impairment of assets held for sale		10	2
Total asset impairment charges		21	503	13
Restructuring Costs and Asset Impairment Charges, Total		69	622	126
Corporate
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		2	5	11
Asset impairments related to restructuring actions		0	0	0
Other non-restructuring asset impairments		7	17	0
Impairment of assets held for sale		0	0	0
Total asset impairment charges		7	17	0
Restructuring Costs and Asset Impairment Charges, Total		9	22	11
Motorparts \| Reportable Segments
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		5	17	14
Asset impairments related to restructuring actions	$ 25	2	26	0
Other non-restructuring asset impairments		1	0	1
Impairment of assets held for sale		0	1	8
Total asset impairment charges	$ 16	3	27	9
Restructuring Costs and Asset Impairment Charges, Total		8	44	23
Performance Solutions \| Reportable Segments
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		12	25	28
Asset impairments related to restructuring actions		0	0	3
Other non-restructuring asset impairments		0	455	0
Impairment of assets held for sale		0	0	0
Total asset impairment charges		0	455	3
Restructuring Costs and Asset Impairment Charges, Total		12	480	31
Clean Air \| Reportable Segments
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		7	22	29
Asset impairments related to restructuring actions		0	0	0
Other non-restructuring asset impairments		1	0	1
Impairment of assets held for sale		10	0	0
Total asset impairment charges		11	0	1
Restructuring Costs and Asset Impairment Charges, Total		18	22	30
Powertrain \| Reportable Segments
Restructuring Cost and Reserve [Line Items]
Severance and other charges, net		22	50	31
Asset impairments related to restructuring actions		0	3	0
Other non-restructuring asset impairments		0	0	0
Impairment of assets held for sale		0	1	0
Total asset impairment charges		0	4	0
Restructuring Costs and Asset Impairment Charges, Total		$ 22	$ 54	$ 31

Asset Impairments, Restructuring Charges

No definition available.

Name:	ten_AssetImpairmentsRestructuringCharges
Namespace Prefix:	ten_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228

+ Details

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

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2611-110228

+ Details

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

- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

+ Details

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

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

- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

+ Details

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

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

+ Details

Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
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:

- Details

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

- Details

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