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Schedule of Segment Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Revenues [1],[2] $ 2,819,880 $ 2,676,298 $ 3,155,045
Cost of revenues 1,141,833 1,116,443 1,257,877
Engineering and development 409,476 370,593 381,077
Selling and marketing 351,028 319,356 309,992
General and administrative 165,562 159,373 154,174
Other segment items [3],[4] 142,895 184,961 211,540
Income (loss) before taxes [4] 609,086 525,572 840,385
Total assets [5] 3,708,714 3,486,824 3,501,252
Property additions 198,095 159,642 163,249
Depreciation and amortization expense 119,741 110,886 110,675
All Other      
Segment Reporting Information [Line Items]      
Revenues [1] 331,112 343,927 401,053
Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 2,488,768 2,332,371 2,753,741
Cost of revenues 1,021,433 998,403 1,132,355
Engineering and development 362,920 326,055 336,966
Selling and marketing 300,711 269,225 258,104
General and administrative 144,280 134,269 133,389
Other segment items [3],[4] 178,808 160,167 165,249
Income (loss) before taxes [4] 480,616 444,252 727,678
Total assets [5] 2,029,236 2,126,165 2,101,403
Property additions 190,405 154,403 152,610
Depreciation and amortization expense 113,405 104,095 102,261
Operating Segments | Semiconductor Test      
Segment Reporting Information [Line Items]      
Revenues 2,123,920 1,957,188 2,350,603
Cost of revenues 866,353 846,570 970,972
Engineering and development 295,614 257,387 272,296
Selling and marketing 187,384 162,068 156,520
General and administrative 89,952 77,786 75,544
Other segment items [3],[4] 126,449 114,873 131,464
Income (loss) before taxes [4] 558,168 498,504 743,807
Total assets [5] 1,287,219 1,388,842 1,435,766
Property additions 168,130 113,664 126,899
Depreciation and amortization expense 85,737 78,568 76,922
Operating Segments | Robotics      
Segment Reporting Information [Line Items]      
Revenues 364,848 375,183 403,138
Cost of revenues 155,080 151,833 161,383
Engineering and development 67,306 68,668 64,670
Selling and marketing 113,327 107,157 101,584
General and administrative 54,328 56,483 57,845
Other segment items [3],[4] 52,359 45,294 33,785
Income (loss) before taxes [4] (77,552) (54,252) (16,129)
Total assets [5] 742,017 737,323 665,638
Property additions 22,275 40,739 25,711
Depreciation and amortization expense 27,668 25,527 25,339
Operating Segments | All Other      
Segment Reporting Information [Line Items]      
Revenues 331,112 343,927 401,053
Cost of revenues 120,400 118,040 125,522
Engineering and development 46,556 44,538 44,111
Selling and marketing 50,317 50,131 51,888
General and administrative 21,282 25,104 20,785
Other segment items [3],[4] 26,833 26,657 34,587
Income (loss) before taxes [4] 65,724 79,457 124,160
Total assets [5] 213,749 191,055 207,079
Property additions 7,690 5,239 10,639
Depreciation and amortization expense 6,336 7,021 7,836
Corporate And Eliminations      
Segment Reporting Information [Line Items]      
Revenues 0 0 251
Cost of revenues 0 0 0
Engineering and development 0 0 0
Selling and marketing 0 0 0
General and administrative 0 0 0
Other segment items [3],[4] (62,746) (1,863) 11,704
Income (loss) before taxes [4] 62,746 1,863 (11,453)
Total assets [5] 1,465,730 1,169,605 1,192,769
Property additions 0 0  
Depreciation and amortization expense $ 0 $ (230) $ 578
[1] Includes $3.7 million, $5.2 million and $8.2 million in 2024, 2023 and 2022, respectively, for leases of Teradyne’s systems recognized outside of ASC 606: “Revenue from Contracts with Customers.”
[2] Revenues attributable to a country are based on location of customer site.
[3] For each reportable segment, the other segment items category includes equity and variable compensation, acquired intangible assets amortization, and restructuring and other charges.
[4] Included in Corporate and Eliminations are interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations, acquired intangible amortization, gain on the sale of a business, pension and postretirement plan actuarial gains (losses), legal and environmental fees, contingent consideration adjustments, acquisition and divestiture related expenses, contract termination settlement charge, and an expense for the modification of Teradyne's former chief executive officer's outstanding equity awards.
[5] Total assets are attributable to each segment. In 2023, Semiconductor Test includes $34.8 million of total assets classified as assets held for sale. See Note E: "Dispositions" for additional information. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.