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. 03, 2022		Jul. 04, 2021		Jul. 03, 2022		Jul. 04, 2021
Disaggregation of Revenue [Line Items]
Total	$ 840,766	[1]	$ 1,085,728	[1]	$ 1,596,136	[2]	$ 1,867,334	[2]
Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	541,348		833,976		1,023,688		1,362,039
System Test
Disaggregation of Revenue [Line Items]
Total	134,702	[1]	104,819	[1]	253,371	[2]	237,656	[2]
Industrial Automation
Disaggregation of Revenue [Line Items]
Total	101,055		92,186		204,244		172,137
Wireless Test
Disaggregation of Revenue [Line Items]
Total	63,854	[1]	54,893	[1]	115,372	[2]	95,791	[2]
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	(193)	[1]	(146)	[1]	(539)	[2]	(289)	[2]
Point in Time
Disaggregation of Revenue [Line Items]
Total	747,475	[1]	989,363	[1]	1,412,951	[2]	1,690,447	[2]
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	118,692	[1]	88,197	[1]	223,981	[2]	207,511	[2]
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	60,765	[1]	51,619	[1]	109,194	[2]	89,499	[2]
Point in Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	(193)	[1]	(146)	[1]	(539)	[2]	(289)	[2]
Over Time
Disaggregation of Revenue [Line Items]
Total	93,291	[1]	96,365	[1]	183,185	[2]	176,887	[2]
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	16,010	[1]	16,622	[1]	29,390	[2]	30,145	[2]
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	3,089	[1]	3,274	[1]	6,178	[2]	6,292	[2]
Over Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0	[2]
Americas
Disaggregation of Revenue [Line Items]
Total	116,903	[1]	100,467	[1]	231,324	[2]	181,476	[2]
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	33,409	[1]	36,256	[1]	70,017	[2]	63,915	[2]
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	17,460	[1]	7,107	[1]	27,147	[2]	12,876	[2]
Americas | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	(193)	[1]	(146)	[1]	(539)	[2]	(289)	[2]
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	68,966	[1]	59,600	[1]	146,080	[2]	114,580	[2]
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	5,709	[1]	7,333	[1]	13,985	[2]	12,991	[2]
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	2,288	[1]	1,984	[1]	9,173	[2]	3,581	[2]
Europe, Middle East and Africa | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0	[2]
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	654,897	[1]	925,661	[1]	1,218,732	[2]	1,571,278	[2]
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	95,584	[1]	61,230	[1]	169,369	[2]	160,750	[2]
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	44,106	[1]	45,802	[1]	79,052	[2]	79,334	[2]
Asia Pacific | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0	[2]
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	459,464	[1]	741,670	[1]	846,048	[2]	1,161,900	[2]
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	395,211	[1]	675,958	[1]	718,666	[2]	1,040,148	[2]
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	64,253	[1]	65,712	[1]	127,382	[2]	121,752	[2]
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	28,714	[1]	21,664	[1]	58,428	[2]	42,443	[2]
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	17,213	[1]	9,011	[1]	33,343	[2]	21,226	[2]
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	413,537	[1]	710,995	[1]	754,277	[2]	1,098,231	[2]
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	81,884	[1]	92,306	[1]	177,640	[2]	200,139	[2]
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	74,790	[1]	84,232	[1]	163,513	[2]	186,124	[2]
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	7,094	[1]	8,074	[1]	14,127	[2]	14,015	[2]
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	2,552	[1]	3,672	[1]	4,598	[2]	7,092	[2]
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	336	[1]	1,483	[1]	895	[2]	1,847	[2]
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	78,996	[1]	87,151	[1]	172,147	[2]	191,200	[2]
Universal Robots (UR) | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	82,513	[1]	76,077	[1]	167,797	[2]	141,678	[2]
Universal Robots (UR) | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	80,409	[1]	74,412	[1]	163,591	[2]	138,419	[2]
Universal Robots (UR) | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	2,104	[1]	1,665	[1]	4,206	[2]	3,259	[2]
Universal Robots (UR) | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	27,732	[1]	24,808	[1]	55,880	[2]	42,961	[2]
Universal Robots (UR) | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	37,424	[1]	33,225	[1]	75,939	[2]	62,840	[2]
Universal Robots (UR) | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	17,357	[1]	18,044	[1]	35,978	[2]	35,877	[2]
MiR | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	17,398	[1]	15,900	[1]	34,606	[2]	30,031	[2]
MiR | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	16,730	[1]	15,091	[1]	33,264	[2]	29,155	[2]
MiR | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	668	[1]	809	[1]	1,342	[2]	876	[2]
MiR | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	6,085	[1]	6,897	[1]	13,952	[2]	12,050	[2]
MiR | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	5,996	[1]	6,564	[1]	12,745	[2]	12,095	[2]
MiR | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	5,317	[1]	2,439	[1]	7,909	[2]	5,886	[2]
Autoguide LLC [Member] | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	1,144	[1]	209	[1]	1,841	[2]	428	[2]
Autoguide LLC [Member] | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	1,071	[1]	0	[1]	1,281	[2]	(120)	[2]
Autoguide LLC [Member] | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	73	[1]	209	[1]	560	[2]	548	[2]
Autoguide LLC [Member] | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	1,144	[1]	209	[1]	1,841	[2]	428	[2]
Autoguide LLC [Member] | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0	[2]
Autoguide LLC [Member] | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	$ 0	[1]	$ 0	[1]	$ 0	[2]	$ 0	[2]

[1] Includes $1.9 million and $4.2 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”

[2] Includes $4.2 million and $7.3 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside ASC 606 “Revenue from Contracts with Customers.”