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. 02, 2022		Oct. 03, 2021		Oct. 02, 2022		Oct. 03, 2021
Disaggregation of Revenue [Line Items]
Total	$ 827,073	[1]	$ 950,501	[1]	$ 2,423,209	[2]	$ 2,817,835
Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	575,704		688,232		1,599,392		2,050,271
System Test
Disaggregation of Revenue [Line Items]
Total	116,154	[1]	102,605	[1]	369,525	[2]	340,261
Industrial Automation
Disaggregation of Revenue [Line Items]
Total	89,067		91,014		292,772		263,151
Wireless Test
Disaggregation of Revenue [Line Items]
Total	46,148	[1]	68,713	[1]	161,520	[2]	164,504
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	(63)	[1]	0	[2]	(352)
Point in Time
Disaggregation of Revenue [Line Items]
Total	724,202	[1]	856,287	[1]	2,137,154	[2]	2,546,734
Point in Time | System Test
Disaggregation of Revenue [Line Items]
Total	93,248	[1]	88,155	[1]	317,230	[2]	295,666
Point in Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	42,885	[1]	65,409	[1]	152,079	[2]	154,908
Point in Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	(63)	[1]	0	[2]	(352)
Over Time
Disaggregation of Revenue [Line Items]
Total	102,871	[1]	94,214	[1]	286,055	[2]	271,101
Over Time | System Test
Disaggregation of Revenue [Line Items]
Total	22,906	[1]	14,450	[1]	52,295	[2]	44,595
Over Time | Wireless Test
Disaggregation of Revenue [Line Items]
Total	3,263	[1]	3,304	[1]	9,441	[2]	9,596
Over Time | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0
Americas
Disaggregation of Revenue [Line Items]
Total	114,586	[1]	105,999	[1]	345,914	[2]	287,475
Americas | System Test
Disaggregation of Revenue [Line Items]
Total	35,865	[1]	34,560	[1]	105,884	[2]	98,475
Americas | Wireless Test
Disaggregation of Revenue [Line Items]
Total	9,481	[1]	11,352	[1]	36,628	[2]	24,228
Americas | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	(63)	[1]	0	[2]	(352)
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total	60,370	[1]	74,711	[1]	206,449	[2]	189,291
Europe, Middle East and Africa | System Test
Disaggregation of Revenue [Line Items]
Total	6,521	[1]	5,288	[1]	20,506	[2]	18,279
Europe, Middle East and Africa | Wireless Test
Disaggregation of Revenue [Line Items]
Total	2,247	[1]	3,017	[1]	11,420	[2]	6,598
Europe, Middle East and Africa | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0
Asia Pacific
Disaggregation of Revenue [Line Items]
Total	652,117	[1]	769,791	[1]	1,870,846	[2]	2,341,069
Asia Pacific | System Test
Disaggregation of Revenue [Line Items]
Total	73,768	[1]	62,757	[1]	243,135	[2]	223,507
Asia Pacific | Wireless Test
Disaggregation of Revenue [Line Items]
Total	34,420	[1]	54,344	[1]	113,472	[2]	133,678
Asia Pacific | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Total	0	[1]	0	[1]	0	[2]	0
SOC | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	450,415	[1]	575,017	[1]	1,296,463	[2]	1,736,917
SOC | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	383,801	[1]	508,747	[1]	1,102,467	[2]	1,548,895
SOC | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	66,614	[1]	66,270	[1]	193,996	[2]	188,022
SOC | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	31,719	[1]	29,119	[1]	90,148	[2]	71,562
SOC | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	19,373	[1]	26,012	[1]	52,716	[2]	47,238
SOC | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	399,323	[1]	519,886	[1]	1,153,599	[2]	1,618,117
Memory | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	125,289	[1]	113,215	[1]	302,929	[2]	313,354
Memory | Point in Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	117,943	[1]	105,454	[1]	281,456	[2]	291,578
Memory | Over Time | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	7,346	[1]	7,761	[1]	21,473	[2]	21,776
Memory | Americas | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	2,129	[1]	2,281	[1]	6,727	[2]	9,373
Memory | Europe, Middle East and Africa | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	321	[1]	572	[1]	1,216	[2]	2,419
Memory | Asia Pacific | Semiconductor Test
Disaggregation of Revenue [Line Items]
Total	122,839	[1]	110,362	[1]	294,986	[2]	301,562
Universal Robots (UR) | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	73,362	[1]	77,750	[1]	240,620	[2]	219,428
Universal Robots (UR) | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	71,300	[1]	76,008	[1]	234,352	[2]	214,427
Universal Robots (UR) | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	2,062	[1]	1,742	[1]	6,268	[2]	5,001
Universal Robots (UR) | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	26,515	[1]	23,429	[1]	81,857	[2]	66,390
Universal Robots (UR) | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	27,997	[1]	34,667	[1]	103,935	[2]	97,507
Universal Robots (UR) | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	18,850	[1]	19,654	[1]	54,828	[2]	55,531
MiR | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	15,705	[1]	13,264	[1]	52,152	[2]	43,723
MiR | Point in Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	15,025	[1]	12,577	[1]	49,570	[2]	41,612
MiR | Over Time | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	680	[1]	687	[1]	2,582	[2]	2,111
MiR | Americas | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	8,877	[1]	5,321	[1]	24,670	[2]	17,799
MiR | Europe, Middle East and Africa | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	3,911	[1]	5,155	[1]	16,656	[2]	17,250
MiR | Asia Pacific | Industrial Automation
Disaggregation of Revenue [Line Items]
Total	$ 2,917	[1]	$ 2,788	[1]	$ 10,826	[2]	$ 8,674

[1] Includes $3.8 million and $3.8 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 $11.1 million and $11.1 million in 2022 and 2021, respectively, for leases of Teradyne’s systems recognized outside ASC 606 “Revenue from Contracts with Customers.”