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Schedule of Segment Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jul. 02, 2023 | Jun. 30, 2024 | Jul. 02, 2023 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 729,879 | [1] | $ 684,437 | [1] | $ 1,329,698 | [2] | $ 1,301,966 | [2] |
Income (loss) before income taxes | [3],[4] | 219,403 |  | 144,402 |  | 292,305 |  | 241,486 |  |
Total assets |  | 3,631,706 | [5] | 3,394,896 | [5] | 3,631,706 | [5] | 3,394,896 | [5] | $ 3,486,824
System Test |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 60,801 | [1] | 94,272 | [1] | 136,123 | [2] | 168,903 | [2] |
Wireless Test |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 36,267 | [1] | 43,823 | [1] | 60,856 | [2] | 82,498 | [2] |
Operating Segments |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 729,879 |  | 684,437 |  | 1,329,698 |  | 1,301,966 |  |
Income (loss) before income taxes | [3],[4] | 155,562 |  | 143,258 |  | 238,497 |  | 245,580 |  |
Total assets | [5] | 2,296,483 |  | 2,381,112 |  | 2,296,483 |  | 2,381,112 |  |
Operating Segments | Semiconductor Test |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 542,564 |  | 474,708 |  | 954,817 |  | 889,717 |  |
Income (loss) before income taxes | [3],[4] | 158,284 |  | 129,040 |  | 237,698 |  | 225,225 |  |
Total assets | [5] | 1,306,390 |  | 1,416,109 |  | 1,306,390 |  | 1,416,109 |  |
Operating Segments | System Test |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 60,801 |  | 94,272 |  | 136,123 |  | 168,903 |  |
Income (loss) before income taxes | [3],[4] | 5,224 |  | 28,599 |  | 23,615 |  | 43,874 |  |
Total assets | [5] | 175,567 |  | 191,002 |  | 175,567 |  | 191,002 |  |
Operating Segments | Robotics |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 90,247 |  | 71,634 |  | 177,901 |  | 160,848 |  |
Income (loss) before income taxes | [3],[4] | (17,916) |  | (26,401) |  | (31,892) |  | (44,891) |  |
Total assets | [5] | 731,264 |  | 685,132 |  | 731,264 |  | 685,132 |  |
Operating Segments | Wireless Test |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 36,267 |  | 43,823 |  | 60,856 |  | 82,498 |  |
Income (loss) before income taxes | [3],[4] | 9,970 |  | 12,020 |  | 9,076 |  | 21,372 |  |
Total assets | [5] | 83,262 |  | 88,869 |  | 83,262 |  | 88,869 |  |
Corporate And Eliminations |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | 0 |  | 0 |  | 0 |  | 0 |  |
Income (loss) before income taxes | [3],[4] | 63,841 |  | 1,144 |  | 53,808 |  | (4,094) |  |
Total assets | [5] | $ 1,335,223 |  | $ 1,013,784 |  | $ 1,335,223 |  | $ 1,013,784 |  |
[1] | Include s $0.8 million and $1.3 million in 2024 and 2023, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”
[2] | Includes $1.7 million and $2.5 million in 2024 and 2023, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”
[3] | Included in Corporate and Eliminations are: interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations, severance charges, pension, acquisition and divestiture related fees, and an expense for the modification of outstanding equity awards.
[4] | Included in income (loss) before taxes are charges related to restructuring and other, expense for the modification of outstanding equity awards, and inventory charges.
[5] | Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities, and certain other assets.

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