v3.26.3
Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 27, 2026
Sep. 28, 2025
Sep. 27, 2026
Sep. 28, 2025
Disaggregation of Revenue [Line Items]        
Total $ 1,305,950 $ 769,210 $ 3,917,434 $ 2,106,687
Product Test        
Disaggregation of Revenue [Line Items]        
Total 138,111 88,256 325,794 247,498
Point in Time        
Disaggregation of Revenue [Line Items]        
Total 1,193,926 662,649 3,584,641 1,793,889
Point in Time | Product Test        
Disaggregation of Revenue [Line Items]        
Total 121,690 69,579 274,143 192,296
Over Time        
Disaggregation of Revenue [Line Items]        
Total 112,024 106,561 332,793 312,798
Over Time | Product Test        
Disaggregation of Revenue [Line Items]        
Total 16,421 18,677 51,651 55,202
Americas        
Disaggregation of Revenue [Line Items]        
Total 123,217 99,432 346,673 298,612
Americas | Product Test        
Disaggregation of Revenue [Line Items]        
Total 58,394 55,225 156,951 138,239
Europe, Middle East and Africa        
Disaggregation of Revenue [Line Items]        
Total 64,475 56,999 216,951 156,230
Europe, Middle East and Africa | Product Test        
Disaggregation of Revenue [Line Items]        
Total 6,761 7,895 24,339 23,676
Asia Pacific        
Disaggregation of Revenue [Line Items]        
Total 1,118,258 612,779 3,353,810 1,651,845
Asia Pacific | Product Test        
Disaggregation of Revenue [Line Items]        
Total 72,956 25,136 144,504 85,583
System on-a-Chip | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 676,509 440,216 2,401,289 1,243,194
System on-a-Chip | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 601,845 367,404 2,181,364 1,030,682
System on-a-Chip | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 74,664 72,812 219,925 212,512
System on-a-Chip | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 23,963 14,432 55,916 65,404
System on-a-Chip | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 25,189 15,825 88,591 44,846
System on-a-Chip | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 627,357 409,959 2,256,782 1,132,944
Memory | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 300,821 128,062 715,603 298,413
Memory | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 289,515 118,878 683,003 272,534
Memory | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 11,306 9,184 32,600 25,879
Memory | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 1,377 1,029 9,157 4,023
Memory | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 906 499 2,021 1,707
Memory | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 298,538 126,534 704,425 292,683
IST | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 94,681 37,589 187,745 98,642
IST | Point in Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 87,825 33,575 167,152 85,294
IST | Over Time | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 6,856 4,014 20,593 13,348
IST | Americas | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 531 291 3,425 2,860
IST | Europe, Middle East and Africa | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 0 0 0 0
IST | Asia Pacific | Semiconductor Test        
Disaggregation of Revenue [Line Items]        
Total 94,150 37,298 184,320 95,782
Universal Robots (UR) | Robotics        
Disaggregation of Revenue [Line Items]        
Total 95,828 75,087 287,003 218,940
Universal Robots (UR) | Point in Time | Robotics        
Disaggregation of Revenue [Line Items]        
Total 93,051 73,213 278,979 213,083
Universal Robots (UR) | Over Time | Robotics        
Disaggregation of Revenue [Line Items]        
Total 2,777 1,874 8,024 5,857
Universal Robots (UR) | Americas | Robotics        
Disaggregation of Revenue [Line Items]        
Total 38,952 28,455 121,224 88,086
Universal Robots (UR) | Europe, Middle East and Africa | Robotics        
Disaggregation of Revenue [Line Items]        
Total 31,619 32,780 102,000 86,001
Universal Robots (UR) | Asia Pacific | Robotics        
Disaggregation of Revenue [Line Items]        
Total $ 25,257 $ 13,852 $ 63,779 $ 44,853