Restructuring and Other Charges, Net - Divestitures (Details) $ in Millions	3 Months Ended
Dec. 29, 2023 USD ($) item	Dec. 30, 2022 USD ($)
Divestitures, Not Discontinued Operation
Proceeds from divestiture of business, net of cash retained by businesses sold	$ 38
Impairment of held for sale business and loss on divestiture	$ 11	$ 6
Fiscal 2024 Divestitures \| Transportation Solutions
Divestitures, Not Discontinued Operation
Number of Businesses Sold \| item	1
Proceeds from divestiture of business, net of cash retained by businesses sold	$ 38
Net pre-tax loss on divestiture	$ (11)

Amount before tax of loss (gain) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. With the aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

No definition available.

+ Details

Name:	tel_DisposalGroupNotDiscontinuedOperationGainLossOnDisposalAndImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix:	tel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of businesses divested by the entity during the period

+ References

No definition available.

+ Details

Name:	tel_NumberOfBusinessesSold
Namespace Prefix:	tel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482130/360-10-45-5

+ Details

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

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

+ Details

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

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=tel_Fiscal2024DivestituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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