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Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 04, 2021
Jun. 28, 2020
Jul. 04, 2021
Jun. 28, 2020
Disaggregation of Revenue [Line Items]        
Total $ 1,085,728 [1] $ 838,661 [1] $ 1,867,334 [2] $ 1,543,016 [2]
Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 833,976 659,147 1,362,039 1,143,636
System Test        
Disaggregation of Revenue [Line Items]        
Total 104,819 [1] 71,806 [1] 237,656 [2] 187,882 [2]
Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 92,186 58,776 172,137 119,081
Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 54,893 [1] 49,185 [1] 95,791 [2] 92,670 [2]
Corporate and Other        
Disaggregation of Revenue [Line Items]        
Total (146) [1] (253) [1] (289) [2] (253) [2]
Point in Time        
Disaggregation of Revenue [Line Items]        
Total 989,363 [1] 760,771 [1] 1,690,447 [2] 1,387,705 [2]
Point in Time | System Test        
Disaggregation of Revenue [Line Items]        
Total 88,197 [1] 57,741 [1] 207,511 [2] 158,453 [2]
Point in Time | Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 51,619 [1] 46,347 [1] 89,499 [2] 87,403 [2]
Point in Time | Corporate and Other        
Disaggregation of Revenue [Line Items]        
Total (146) [1] (253) [1] (289) [2] (253) [2]
Over Time        
Disaggregation of Revenue [Line Items]        
Total 96,365 [1] 77,890 [1] 176,887 [2] 155,311 [2]
Over Time | System Test        
Disaggregation of Revenue [Line Items]        
Total 16,622 [1] 14,065 [1] 30,145 [2] 29,429 [2]
Over Time | Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 3,274 [1] 2,838 [1] 6,292 [2] 5,267 [2]
Americas        
Disaggregation of Revenue [Line Items]        
Total 100,467 [1] 68,407 [1] 181,476 [2] 145,346 [2]
Americas | System Test        
Disaggregation of Revenue [Line Items]        
Total 36,256 [1] 28,494 [1] 63,915 [2] 56,784 [2]
Americas | Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 7,107 [1] 5,353 [1] 12,876 [2] 10,041 [2]
Americas | Corporate and Other        
Disaggregation of Revenue [Line Items]        
Total (146) [1] (253) [1] (289) [2] (253) [2]
Europe, Middle East and Africa        
Disaggregation of Revenue [Line Items]        
Total 59,600 [1] 43,988 [1] 114,580 [2] 102,231 [2]
Europe, Middle East and Africa | System Test        
Disaggregation of Revenue [Line Items]        
Total 7,333 [1] 4,656 [1] 12,991 [2] 12,424 [2]
Europe, Middle East and Africa | Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 1,984 [1] 1,925 [1] 3,581 [2] 2,918 [2]
Asia Pacific        
Disaggregation of Revenue [Line Items]        
Total 925,661 [1] 726,266 [1] 1,571,278 [2] 1,295,439 [2]
Asia Pacific | System Test        
Disaggregation of Revenue [Line Items]        
Total 61,230 [1] 38,656 [1] 160,750 [2] 118,674 [2]
Asia Pacific | Wireless Test        
Disaggregation of Revenue [Line Items]        
Total 45,802 [1] 41,907 [1] 79,334 [2] 79,711 [2]
SOC | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 741,670 [1] 574,573 [1] 1,161,900 [2] 974,713 [2]
SOC | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 675,958 [1] 520,496 [1] 1,040,148 [2] 868,542 [2]
SOC | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 65,712 [1] 54,077 [1] 121,752 [2] 106,171 [2]
SOC | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 21,664 [1] 16,251 [1] 42,443 [2] 33,637 [2]
SOC | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 9,011 [1] 10,622 [1] 21,226 [2] 30,643 [2]
SOC | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 710,995 [1] 547,700 [1] 1,098,231 [2] 910,433 [2]
Memory | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 92,306 [1] 84,574 [1] 200,139 [2] 168,923 [2]
Memory | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 84,232 [1] 80,032 [1] 186,124 [2] 159,429 [2]
Memory | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 8,074 [1] 4,542 [1] 14,015 [2] 9,494 [2]
Memory | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 3,672 [1] 855 [1] 7,092 [2] 7,751 [2]
Memory | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 1,483 [1] 1,227 [1] 1,847 [2] 2,571 [2]
Memory | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 87,151 [1] 82,492 [1] 191,200 [2] 158,601 [2]
Universal Robots (UR) | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 76,077 [1] 43,551 [1] 141,678 [2] 93,248 [2]
Universal Robots (UR) | Point in Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 74,412 [1] 41,804 [1] 138,419 [2] 89,306 [2]
Universal Robots (UR) | Over Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 1,665 [1] 1,747 [1] 3,259 [2] 3,942 [2]
Universal Robots (UR) | Americas | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 24,808 [1] 11,364 [1] 42,961 [2] 26,108 [2]
Universal Robots (UR) | Europe, Middle East and Africa | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 33,225 [1] 17,908 [1] 62,840 [2] 41,945 [2]
Universal Robots (UR) | Asia Pacific | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 18,044 [1] 14,279 [1] 35,877 [2] 25,195 [2]
MiR | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 15,900 [1] 11,272 [1] 30,031 [2] 20,410 [2]
MiR | Point in Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 15,091 [1] 11,196 [1] 29,155 [2] 20,293 [2]
MiR | Over Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 809 [1] 76 [1] 876 [2] 117 [2]
MiR | Americas | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 6,897 [1] 2,390 [1] 12,050 [2] 5,855 [2]
MiR | Europe, Middle East and Africa | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 6,564 [1] 7,650 [1] 12,095 [2] 11,730 [2]
MiR | Asia Pacific | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 2,439 [1] 1,232 [1] 5,886 [2] 2,825 [2]
Autoguide LLC [Member] | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 209 [1] 3,953 [1] 428 [2] 5,423 [2]
Autoguide LLC [Member] | Point in Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 0 [1] 3,408 [1] (120) [2] 4,532 [2]
Autoguide LLC [Member] | Over Time | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total 209 [1] 545 [1] 548 [2] 891 [2]
Autoguide LLC [Member] | Americas | Industrial Automation        
Disaggregation of Revenue [Line Items]        
Total $ 209 [1] $ 3,953 [1] $ 428 [2] $ 5,423 [2]
[1] Includes $4.2 million and $2.5 million in 2021 and 2020, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”
[2] Includes $7.3 million and $4.3 million in 2021 and 2020, respectively, for leases of Teradyne’s systems recognized outside ASC 606 “Revenue from Contracts with Customers.”