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Restructuring and Other	6 Months Ended
	Jul. 02, 2023
Restructuring and Related Activities [Abstract]
Restructuring and Other	N. RESTRUCTURING AND OTHER During the three months ended July 2, 2023, Teradyne recorded $5.1 million of severance charges related to headcount reductions of 112 people primarily in Semiconductor Test and Robotics which included charges related to a voluntary early retirement program for employees meeting certain conditions and a charge of $1.1 million for an increase in environmental liability. During the three months ended July 3, 2022, Teradyne recorded a charge of $1.5 million for an increase in environmental and legal liabilities. During the six months ended July 2, 2023, Teradyne recorded $7.2 million of severance charges related to headcount reductions of 179 people primarily in Semiconductor Test and Robotics which included charges related to a voluntary early retirement program for employees meeting certain conditions and a charge of $1.1 million for an increase in environmental liability. During the six months ended July 3, 2022, Teradyne recorded a charge of $14.7 million related to the arbitration claim filed against Teradyne and AutoGuide related to an earn-out dispute, which was settled on March 25, 2022 for $26.7 million, and a charge of $2.0 million for an increase in environmental and legal liabilities.

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- References

No definition available.

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- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//420/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(e))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2

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