Income tax expense (benefit) related to the tax impacts of Swiss Tax Reform

No definition available.

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- Definition

Income tax expense (benefit) relating to increase (reduction) in the valuation allowance recorded against certain U.S. federal tax credit carryforwards.

+ References

No definition available.

+ Details

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- Definition

In connection with the Separation and Distribution Agreement and Tax Sharing Agreement, this is the percentage share for which the entity is responsible for certain contingent liabilities relating to certain guarantee commitments and indemnifications and unresolved pre-Separation tax matters of the Company's former parent.

+ References

No definition available.

+ Details

Name:	tel_LiabilitySharingPercentEntity
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

In connection with the Separation and Distribution Agreement and Tax Sharing Agreement, this is the percentage share for which the Company's former affiliate is responsible for certain contingent liabilities relating to certain guarantee commitments and indemnifications and unresolved pre-Separation tax matters of the Company's former parent.

+ References

No definition available.

+ Details

Name:	tel_LiabilitySharingPercentFormerAffiliate
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

In connection with the Separation and Distribution Agreement and Tax Sharing Agreement, this is the percentage share for which the Company's former parent is responsible for certain contingent liabilities relating to certain guarantee commitments and indemnifications and unresolved pre-Separation tax matters of the Company's former parent.

+ References

No definition available.

+ Details

Name:	tel_LiabilitySharingPercentFormerParent
Namespace Prefix:	tel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

+ Details

Name:	us-gaap_TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Income Taxes - Other Income Tax Matters (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 28, 2019	Dec. 29, 2017	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Income Taxes
Income tax benefit related to tax impacts of Swiss Tax Reform	$ 214			$ 216
U.S. federal corporate income tax rate			21.00%	21.00%	24.58%	35.00%
Income tax expense related to tax impacts of the Tax Cuts and Jobs Act		$ 567			$ 567
Income tax benefit related to the reduction in the valuation allowance recorded against certain U.S. federal tax credit carryforwards					$ 34
Liabilities sharing percent, entity				31.00%
Liabilities sharing percent, Tyco International				27.00%
Liabilities sharing percent, Covidien				42.00%