Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($) $ in Thousands		3 Months Ended
		Apr. 03, 2022	Apr. 04, 2021
Disaggregation of Revenue [Line Items]
Total	[1]	$ 755,370	$ 781,606
Semiconductor Test
Disaggregation of Revenue [Line Items]
Total		482,341	528,063
System Test
Disaggregation of Revenue [Line Items]
Total	[1]	118,668	132,837
Industrial Automation
Disaggregation of Revenue [Line Items]
Total		103,189	79,951
Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	51,518	40,898
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	(346)	(143)
Point in Time
Disaggregation of Revenue [Line Items]
Total	[1]	665,476	701,084
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	105,288	119,314
Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	16,534
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	48,429	37,880
Point in Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	(346)	(143)
Over Time
Disaggregation of Revenue [Line Items]
Total	[1]	89,894	80,522
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	13,380	13,523
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	3,089	3,018
Over Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	0
Americas
Disaggregation of Revenue [Line Items]
Total	[1]	114,421	81,009
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	36,608	27,659
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	9,687	5,769
Americas | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	(346)	(143)
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	[1]	77,114	54,980
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	8,276	5,658
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	6,885	1,597
Europe, Middle East and Africa | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	0
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	[1]	563,835	645,617
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	73,784	99,520
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	34,946	33,532
Asia Pacific | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	0
SOC
Disaggregation of Revenue [Line Items]
Total	[1]	386,585
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		420,230
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	323,456	364,190
SOC | Over Time
Disaggregation of Revenue [Line Items]
Total	[1]	63,129
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		56,040
SOC | Americas
Disaggregation of Revenue [Line Items]
Total	[1]	29,714
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		20,779
SOC | Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	[1]	16,130
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		12,215
SOC | Asia Pacific
Disaggregation of Revenue [Line Items]
Total	[1]	340,741
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		387,236
Memory
Disaggregation of Revenue [Line Items]
Total	[1]	95,756
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		107,833
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	88,723	101,892
Memory | Over Time
Disaggregation of Revenue [Line Items]
Total	[1]	7,033
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		5,941
Memory | Americas
Disaggregation of Revenue [Line Items]
Total	[1]	2,046
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		3,420
Memory | Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	[1]	559
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		364
Memory | Asia Pacific
Disaggregation of Revenue [Line Items]
Total	[1]	93,151
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]		104,049
Universal Robots (UR) | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	85,284	65,601
Universal Robots (UR) | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	83,182	64,007
Universal Robots (UR) | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	2,102	1,594
Universal Robots (UR) | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	28,148	18,153
Universal Robots (UR) | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	38,515	29,615
Universal Robots (UR) | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	18,621	17,833
MiR | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	17,208	14,131
MiR | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]		14,064
MiR | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	674	67
MiR | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	7,867	5,153
MiR | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	6,749	5,531
MiR | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	2,592	3,447
Autoguide LLC [Member] | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	697	219
Autoguide LLC [Member] | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	210	(120)
Autoguide LLC [Member] | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	487	339
Autoguide LLC [Member] | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	697	219
Autoguide LLC [Member] | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	0	0
Autoguide LLC [Member] | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	[1]	$ 0	$ 0

[1] Includes $3.1 million and $3.1 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”