Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($) $ in Thousands		3 Months Ended
		Apr. 02, 2023	Apr. 03, 2022
Disaggregation of Revenue [Line Items]
Total	[1]	$ 617,529	$ 755,370
Semiconductor Test
Disaggregation of Revenue [Line Items]
Total		415,009	482,341
System Test
Disaggregation of Revenue [Line Items]
Total	[1]	74,631	118,668
Robotics
Disaggregation of Revenue [Line Items]
Total		89,214	103,189
Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	38,675	51,518
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	(346)
Point in Time
Disaggregation of Revenue [Line Items]
Total	[1]	512,741	665,476
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	56,857	105,288
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	35,363	48,429
Point in Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	(346)
Over Time
Disaggregation of Revenue [Line Items]
Total	[1]	104,788	89,894
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	17,774	13,380
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	3,312	3,089
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	[1]	424,494	563,835
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	39,590	73,784
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	23,231	34,946
Americas
Disaggregation of Revenue [Line Items]
Total	[1]	118,591	114,421
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	28,980	36,608
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	12,846	9,687
Americas | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	[1]	0	(346)
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	[1]	74,444	77,114
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	6,061	8,276
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	2,598	6,885
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	346,834	386,585
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	273,275	323,456
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	73,559	63,129
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	283,259	340,741
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	41,568	29,714
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	22,007	16,130
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	68,175	95,756
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	61,258	88,723
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	6,917	7,033
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	63,695	93,151
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	2,944	2,046
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	1,536	559
Universal Robots (UR) | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	72,037	85,284
Universal Robots (UR) | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	70,029	83,182
Universal Robots (UR) | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	2,008	2,102
Universal Robots (UR) | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	13,217	18,621
Universal Robots (UR) | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	20,447	28,148
Universal Robots (UR) | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	38,373	38,515
MiR | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	17,177	17,905
MiR | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	15,959	16,744
MiR | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	1,218	1,161
MiR | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	1,502	2,592
MiR | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	11,806	8,564
MiR | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	$ 3,869	$ 6,749

[1] Includes $1.3 million and $2.3 million in 2023 and 2022, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”