Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Apr. 02, 2023
Disaggregation of Revenue [Line Items]
Total	[1]	$ 599,819	$ 617,529
System Test
Disaggregation of Revenue [Line Items]
Total	[1]	75,322	74,631
Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	24,589	38,675
Point in Time
Disaggregation of Revenue [Line Items]
Total	[1]	496,198	512,741
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	58,073	56,857
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	20,914	35,363
Over Time
Disaggregation of Revenue [Line Items]
Total	[1]	103,621	104,788
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	17,249	17,774
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	3,675	3,312
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	[1]	423,674	424,494
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	25,781	39,590
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	17,141	23,231
Americas
Disaggregation of Revenue [Line Items]
Total	[1]	108,651	118,591
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	36,594	28,980
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	5,824	12,846
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	[1]	67,494	74,444
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	[1]	12,947	6,061
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	[1]	1,624	2,598
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	302,308	346,834
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	229,592	273,275
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	72,716	73,559
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	270,567	283,259
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	22,551	41,568
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	9,190	22,007
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	109,946	68,175
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	102,436	61,258
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	7,510	6,917
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	95,606	63,695
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	9,052	2,944
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	[1]	5,288	1,536
Universal Robots (UR) | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	67,761	72,037
Universal Robots (UR) | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	65,893	70,029
Universal Robots (UR) | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	1,868	2,008
Universal Robots (UR) | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	11,625	13,217
Universal Robots (UR) | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	20,005	20,447
Universal Robots (UR) | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	36,131	38,373
MiR | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	19,893	17,177
MiR | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	19,290	15,959
MiR | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	603	1,218
MiR | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	2,954	1,502
MiR | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	14,625	11,806
MiR | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	[1]	$ 2,314	$ 3,869

[1] Includes $0.9 million and $1.3 million in the three months ended March 31, 2024 and in the three months ended April 2, 2023, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”