Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 01, 2023		Oct. 02, 2022		Oct. 01, 2023		Oct. 02, 2022
Disaggregation of Revenue [Line Items]
Total	$ 703,732	[1]	$ 827,073	[1]	$ 2,005,699	[2]	$ 2,423,209	[2]
Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	497,863		575,704		1,387,580		1,599,392
System Test
Disaggregation of Revenue [Line Items]
Total	83,203	[1]	116,154	[1]	252,106	[2]	369,525	[2]
Robotics
Disaggregation of Revenue [Line Items]
Total	85,692		89,067		246,541		292,772
Wireless Test
Disaggregation of Revenue [Line Items]
Total	36,974	[1]	46,148	[1]	119,472	[2]	161,520	[2]
Point in Time
Disaggregation of Revenue [Line Items]
Total	599,099	[1]	724,202	[1]	1,692,038	[2]	2,137,154	[2]
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	66,418	[1]	93,248	[1]	200,076	[2]	317,230	[2]
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	32,638	[1]	42,885	[1]	108,262	[2]	152,079	[2]
Over Time
Disaggregation of Revenue [Line Items]
Total	104,633	[1]	102,871	[1]	313,661	[2]	286,055	[2]
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	16,785	[1]	22,906	[1]	52,030	[2]	52,295	[2]
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	4,336	[1]	3,263	[1]	11,210	[2]	9,441	[2]
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	535,528	[1]	652,117	[1]	1,459,514	[2]	1,870,846	[2]
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	40,464	[1]	73,768	[1]	121,698	[2]	243,135	[2]
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	24,727	[1]	34,420	[1]	70,320	[2]	113,472	[2]
Americas
Disaggregation of Revenue [Line Items]
Total	349,001	[1]	114,586	[1]	105,362	[2]	345,914	[2]
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	105,031	[1]	35,865	[1]	35,888	[2]	105,884	[2]
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	42,476	[1]	9,481		10,139	[2]	36,628	[2]
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	197,184	[1]	60,370	[1]	62,842	[2]	206,449	[2]
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	25,377	[1]	6,521	[1]	6,851	[2]	20,506	[2]
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	6,676	[1]	2,247	[1]	2,108	[2]	11,420	[2]
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	404,110	[1]	450,415	[1]	1,105,638	[2]	1,296,463	[2]
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	330,846	[1]	383,801	[1]	886,201	[2]	1,102,467	[2]
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	73,264	[1]	66,614	[1]	219,436	[2]	193,996	[2]
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	360,375	[1]	399,323	[1]	946,696	[2]	1,153,599	[2]
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	98,511	[1]	31,719	[1]	24,752	[2]	90,148	[2]
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	60,431	[1]	19,373	[1]	18,983	[2]	52,716	[2]
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	93,753	[1]	125,289	[1]	281,942	[2]	302,929	[2]
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	86,247	[1]	117,943	[1]	260,052	[2]	281,456	[2]
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	7,506	[1]	7,346	[1]	21,890	[2]	21,473	[2]
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	91,352	[1]	122,839	[1]	270,297	[2]	294,986	[2]
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	8,586	[1]	2,129	[1]	1,356	[2]	6,727	[2]
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	3,059	[1]	321	[1]	1,045	[2]	1,216	[2]
Universal Robots (UR) | Robotics
Disaggregation of Revenue [Line Items]
Total	70,545	[1]	73,362	[1]	200,429	[2]	240,620	[2]
Universal Robots (UR) | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	68,938	[1]	71,300	[1]	194,698	[2]	234,352	[2]
Universal Robots (UR) | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	1,607	[1]	2,062	[1]	5,731	[2]	6,268	[2]
Universal Robots (UR) | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	15,430	[1]	18,850	[1]	43,530	[2]	54,828	[2]
Universal Robots (UR) | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	69,346	[1]	26,515	[1]	26,073	[2]	81,857	[2]
Universal Robots (UR) | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	87,553	[1]	27,997	[1]	29,042	[2]	103,935	[2]
MiR | Robotics
Disaggregation of Revenue [Line Items]
Total	15,147	[1]	15,705	[1]	46,112	[2]	52,152	[2]
MiR | Point in Time | Robotics
Disaggregation of Revenue [Line Items]
Total	14,012	[1]	15,025	[1]	42,748	[2]	49,570	[2]
MiR | Over Time | Robotics
Disaggregation of Revenue [Line Items]
Total	1,135	[1]	680	[1]	3,364	[2]	2,582	[2]
MiR | Asia Pacific | Robotics
Disaggregation of Revenue [Line Items]
Total	3,180	[1]	2,917	[1]	6,973	[2]	10,826	[2]
MiR | Americas | Robotics
Disaggregation of Revenue [Line Items]
Total	25,051	[1]	8,877	[1]	7,154	[2]	24,670	[2]
MiR | Europe, Middle East and Africa | Robotics
Disaggregation of Revenue [Line Items]
Total	$ 14,088	[1]	$ 3,911	[1]	$ 4,813	[2]	$ 16,656	[2]

[1] Includes $1.4 million and $1.8 million in 2023 and 2022, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”

[2] Includes $3.9 million and $5.9 million in 2023 and 2022, respectively, for leases of Teradyne’s systems recognized outside ASC 606 “Revenue from Contracts with Customers.”