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Business Segments - Narrative (Details)	3 Months Ended
	Mar. 30, 2025 product_line segment acquisition
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Number of acquisitions | acquisition	2
Instrumentation
Segment Reporting Information [Line Items]
Number of product lines	3
Digital Imaging
Segment Reporting Information [Line Items]
Number of product lines	1
Aerospace and Defense Electronics
Segment Reporting Information [Line Items]
Number of product lines	1
Engineered Systems
Segment Reporting Information [Line Items]
Number of product lines	1

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- Definition

Number of Product Lines

+ References

No definition available.

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Namespace Prefix:	tdy_
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Balance Type:	na
Period Type:	instant

X

- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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- 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.

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- Details

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Balance Type:
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X

- Details

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X

- Details

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Namespace Prefix:
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Period Type:

X

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