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Property Plant and Equipment, Net (Parenthetical) (Detail) $ in Millions | Dec. 31, 2023 USD ($)
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Property, Plant and Equipment [Abstract] |
Property, plant and equipment, net classified as assets held for sale | $ 9.0

X
- Definition Property, plant and equipment, net classified as assets held for sale. + References No definition available. + Details
Name: | ter_PropertyPlantAndEquipmentNetClassifiedAsAssetsHeldForSale
Namespace Prefix: | ter_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration