Teradyne (TER) 10-Q 4 Nov 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Oct. 02, 2022	Oct. 31, 2022
Cover [Abstract]
Amendment Flag	false
Document Type	10-Q
Document Fiscal Year Focus	2022
Entity Central Index Key	0000097210
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Document Period End Date	Oct. 02, 2022
Entity Registrant Name	TERADYNE, INC
Entity Filer Category	Large Accelerated Filer
Trading Symbol	TER
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity File Number	001-06462
Entity Incorporation, State or Country Code	MA
Entity Tax Identification Number	04-2272148
Entity Address, Address Line One	600 Riverpark Drive
Entity Address, City or Town	North Reading
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01864
City Area Code	978
Local Phone Number	370-2700
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		155,756,146

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 02, 2022		Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 710,746		$ 1,122,199
Marketable securities	65,310		244,231
Accounts receivable, less allowance for credit losses of $1,865 and $2,012 at October 2, 2022 and December 31, 2021, respectively	530,349		550,749
Inventories, net	310,754		243,330
Prepayments	502,678		406,266
Other current assets	7,717		9,452
Total current assets	2,127,554		2,576,227
Property, plant and equipment, net	415,181		387,240
Operating lease right-of-use assets, net	61,430		68,807
Marketable securities	111,039		133,858
Deferred tax assets	130,207		102,428
Retirement plans assets	13,805		15,110
Other assets	29,311		24,096
Acquired intangible assets, net	55,580		75,635
Goodwill	375,799		426,024
Total assets	3,319,906	[1]	3,809,425
Current liabilities:
Accounts payable	167,975		153,133
Accrued employees' compensation and withholdings	168,102		253,667
Deferred revenue and customer advances	143,591		146,185
Other accrued liabilities	126,457		124,187
Operating lease liabilities	17,079		19,977
Income taxes payable	64,141		88,789
Current debt	14,596		19,182
Total current liabilities	701,941		805,120
Retirement plans liabilities	137,317		151,141
Long-term deferred revenue and customer advances	48,488		54,921
Long-term other accrued liabilities	15,506		15,497
Deferred tax liabilities	1,327		6,327
Long-term operating lease liabilities	51,872		56,178
Long-term incomes taxes payable	59,135		67,041
Debt	50,195		89,244
Total liabilities	1,065,781		1,245,469
Commitments and contingencies (Note Q)
Mezzanine equity:
Convertible common shares			1,512
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized; 157,880 and 162,251 shares issued and outstanding at July 3, 2022 and December 31, 2021, respectively	19,473		20,281
Additional paid-in capital	1,746,779		1,811,545
Accumulated other comprehensive loss	(84,779)		(5,948)
Retained earnings	572,652		736,566
Total shareholders' equity	2,254,125		2,562,444
Total liabilities and shareholders' equity	$ 3,319,906		$ 3,809,425
[1]Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities, and certain other assets.

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Accounts receivable, less allowance for credit losses	$ 1,865	$ 2,012
Common stock, par value	$ 0.125	$ 0.125
Common stock, shares authorized	1,000,000	1,000,000
Common stock, shares issued	155,782	162,251
Common stock, shares outstanding	155,782	162,251

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
		Oct. 02, 2022		Oct. 03, 2021		Oct. 02, 2022		Oct. 03, 2021
Revenues:
Total revenues		$ 827,073	[1]	$ 950,501	[1]	$ 2,423,209	[2]	$ 2,817,835
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		341,694		379,500		976,508		1,138,227
Gross profit		485,379		571,001		1,446,701		1,679,608
Operating expenses:
Selling and administrative		135,632		134,829		415,351		404,812
Engineering and development		111,715		107,220		331,781		317,644
Acquired intangible assets amortization		4,729		5,355		14,663		16,293
Restructuring and other		1,796		1,197		19,554		(3,426)
Total operating expenses		253,872		248,601		781,349		735,323
Income from operations		231,507		322,400		665,352		944,285
Non-operating (income) expense:
Interest income		(1,318)		(626)		(2,972)		(2,066)
Interest expense		779		3,785		2,704		15,354
Other (income) expense, net		5,849		21,486		20,472		25,223
Income before income taxes	[3],[4]	226,197		297,755		645,148		905,774
Income tax provision		42,712		41,037		101,948		115,225
Net income		$ 183,485		$ 256,718		$ 543,200		$ 790,549
Net income per common share:
Basic		$ 1.17		$ 1.56		$ 3.41		$ 4.77
Diluted		$ 1.1		$ 1.41		$ 3.17		$ 4.26
Weighted average common shares—basic		156,364		164,583		159,325		165,690
Weighted average common shares—diluted		166,733		181,987		171,156		185,492
Product [Member]
Revenues:
Total revenues		$ 676,252		$ 825,448		$ 2,000,081		$ 2,437,901
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		277,539		333,229		795,229		989,859
Service [Member]
Revenues:
Total revenues		150,821		125,053		423,128		379,934
Cost of revenues:
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		$ 64,155		$ 46,271		$ 181,279		$ 148,368
[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.”[3]Included in Corporate and Eliminations are: legal and environmental fees, contingent consideration fair value adjustments, interest income, interest expense, severance charges, net foreign exchange gains (losses), acquisition related charges and compensation, pension, intercompany eliminations and for the three and nine months ended October 3, 2021, loss on convertible debt conversions.[4]Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and, for the three and nine months ended October 3, 2021, loss on convertible debt conversions.

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Net income	$ 183,485	$ 256,718	$ 543,200	$ 790,549
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0, $0, $0, $0, respectively	(28,951)	(10,698)	(66,258)	(26,672)
Available-for-sale marketable securities:
Unrealized losses arising during period, net of tax of $(997), $(44), $(3,570), $(516), respectively	(3,581)	(176)	(13,491)	(1,952)
Less: Reclassification adjustment for losses (gains) included in net income, net of tax of $(11), $(65), $(48), $(186), respectively	177	(229)	386	(670)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	(3,404)	(405)	(13,105)	(2,622)
Defined benefit post-retirement plan:
Amortization of prior service credit, net of tax of $0, $0, $(2), $(2), respectively	(2)	(2)	(5)	(5)
Cash flow hedges:
Unrealized gains arising during period, net of tax of $0, $0, $0, $0, respectively	537	0	537	0
Other comprehensive (loss) income	(31,820)	(11,105)	(78,831)	(29,299)
Comprehensive income	$ 151,665	$ 245,613	$ 464,369	$ 761,250

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Foreign currency translation adjustment, net of tax	$ 0	$ 0	$ 0	$ 0
Unrealized (losses) gains on marketable securities arising during period	997	44	3,570	516
Reclassification adjustment for gains included in net income	11	65	48	186
Amortization of prior service credit, net of tax	0	0	2	2
Cash flow hedges Unrealized gains	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE COMMON SHARES AND SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Convertible Common Shares	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings (Accumulated Deficit)
Balance at Dec. 31, 2020	$ 2,207,018		$ 20,765	$ 1,765,323	$ 33,516	$ 387,414
Balance, Shares at Dec. 31, 2020		3,787	166,123
Net issuance of common stock under stock-based plans	64		$ 112	(48)
Net issuance of common stock under stock-based plans (in shares)			893
Stock-based compensation expense	35,915			35,915
Repurchase of common stock	$ (416,180)		$ (411)			(415,769)
Repurchase of common stock (in shares)	3,300		(3,288)
Cash dividends	$ (49,757)					(49,757)
Settlements of convertible notes	841,202		$ 897	840,305
Settlement of convertible debt (in shares)			7,178
Exercise of convertible notes hedge call options	(842,925)		$ (897)	(842,028)
Exercise of convertible notes hedge call options (in shares)			(7,178)
Convertible common shares	906			906
Convertible common shares (in shares)		(906)
Net income	790,549					790,549
Other comprehensive loss	(29,299)				(29,299)
Balance at Oct. 03, 2021	2,537,493		$ 20,466	1,800,373	4,217	712,437
Balance, Shares at Oct. 03, 2021		2,881	163,728
Balance at Jul. 04, 2021	2,493,256		$ 20,680	1,772,302	15,322	684,952
Balance, Shares at Jul. 04, 2021		21,386	165,444
Net issuance of common stock under stock-based plans	(258)		$ 1	(259)
Net issuance of common stock under stock-based plans (in shares)			8
Stock-based compensation expense	10,042			10,042
Repurchase of common stock	(212,996)		$ (215)			(212,781)
Repurchase of common stock (in shares)			(1,724)
Cash dividends	(16,452)					(16,452)
Settlements of convertible notes	637,497		$ 699	636,798
Settlement of convertible debt (in shares)			5,589
Exercise of convertible notes hedge call options	(637,714)		$ (699)	(637,015)
Exercise of convertible notes hedge call options (in shares)			(5,589)
Convertible common shares	18,505			18,505
Convertible common shares (in shares)		(18,505)
Net income	256,718					256,718
Other comprehensive loss	(11,105)				(11,105)
Balance at Oct. 03, 2021	2,537,493		$ 20,466	1,800,373	4,217	712,437
Balance, Shares at Oct. 03, 2021		2,881	163,728
Balance at Dec. 31, 2021	2,562,444		$ 20,281	1,811,545	(5,948)	736,566
Balance, Shares at Dec. 31, 2021		1,512	162,251
Net issuance of common stock under stock-based plans	(4,192)		$ 95	(4,287)
Net issuance of common stock under stock-based plans (in shares)			754
Stock-based compensation expense	39,056			39,056
Repurchase of common stock	$ (750,000)		$ (903)			(749,097)
Repurchase of common stock (in shares)	7,200		(7,223)
Cash dividends	$ (52,617)					(52,617)
Settlements of convertible notes	(213)		$ 151	(364)
Settlement of convertible debt (in shares)			1,211
Exercise of convertible notes hedge call options	0		$ (151)	151
Exercise of convertible notes hedge call options (in shares)			(1,211)
Convertible common shares	1,512
Convertible common shares (in shares)		(1,512)
Cumulative-effect of change in accounting principle related to convertible debt	(6,234)			(100,834)		94,600
Net income	543,200					543,200
Other comprehensive loss	(78,831)				(78,831)
Balance at Oct. 02, 2022	2,254,125		$ 19,473	1,746,779	(84,779)	572,652
Balance, Shares at Oct. 02, 2022		0	155,782
Balance at Jul. 03, 2022	2,298,596		$ 19,735	1,721,586	(52,959)	610,234
Balance, Shares at Jul. 03, 2022		0	157,880
Net issuance of common stock under stock-based plans	12,052		$ 21	12,031
Net issuance of common stock under stock-based plans (in shares)			169
Stock-based compensation expense	13,194			13,194
Repurchase of common stock	(204,201)		$ (283)			(203,918)
Repurchase of common stock (in shares)			(2,267)
Cash dividends	(17,149)					(17,149)
Settlements of convertible notes	(32)		$ 26	(58)
Settlement of convertible debt (in shares)			207
Exercise of convertible notes hedge call options	0		$ (26)	26
Exercise of convertible notes hedge call options (in shares)			(207)
Net income	183,485					183,485
Other comprehensive loss	(31,820)				(31,820)
Balance at Oct. 02, 2022	$ 2,254,125		$ 19,473	$ 1,746,779	$ (84,779)	$ 572,652
Balance, Shares at Oct. 02, 2022		0	155,782

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE COMMON SHARES AND SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Common Stock, Dividends, Per Share, Cash Paid	$ 0.11	$ 0.1	$ 0.33	$ 0.3

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021
Cash flows from operating activities:
Net income	$ 543,200	$ 790,549
Adjustments to reconcile net income from operations to net cash provided by operating activities:
Depreciation	67,902	67,866
Stock-based compensation	37,420	34,649
Provision for excess and obsolete inventory	18,929	11,775
Amortization	15,012	27,626
Losses (gains) on investments	11,436	(4,750)
Deferred taxes	(28,373)	(10,732)
Contingent consideration fair value adjustments	0	(7,227)
Loss on convertible debt conversions	0	25,397
Retirement plan actuarial (gains) losses	0	(627)
Other	740	243
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	4,248	(103,299)
Inventories	(68,817)	21,943
Prepayments and other assets	(94,331)	(138,564)
Accounts payable and other liabilities	(71,682)	65,064
Deferred revenue and customer advances	(5,896)	8,699
Retirement plans contributions	(3,897)	(4,123)
Income taxes	(31,370)	(17,406)
Net cash provided by operating activities	394,521	767,083
Cash flows from investing activities:
Purchases of property, plant and equipment	(128,672)	(103,162)
Purchases of marketable securities	(267,175)	(509,470)
Proceeds from sales of marketable securities	259,200	209,437
Proceeds from maturities of marketable securities	182,092	571,277
Purchase of investment	0	(12,000)
Net cash provided by investing activities	45,445	156,082
Cash flows from financing activities:
Issuance of common stock under stock purchase and stock option plans	28,733	32,590
Repurchase of common stock	(750,000)	(406,180)
Payments related to net settlement of employee stock compensation awards	(32,987)	(32,045)
Payments of convertible debt principal	(52,005)	(301,997)
Dividend payments	(52,578)	(49,711)
Net cash used for financing activities	(858,837)	(757,343)
Effects of exchange rate changes on cash and cash equivalents	7,418	(489)
(Decrease) increase in cash and cash equivalents	(411,453)	165,333
Cash and cash equivalents at beginning of period	1,122,199	914,121
Cash and cash equivalents at end of period	710,746	1,079,454
Non-cash investing activities:
Capital expenditures incurred but not yet paid	$ 2,349	$ 2,286

The Company

The Company	9 Months Ended
	Oct. 02, 2022
The Company	A. THE COMPANY Teradyne, Inc. (“Teradyne”) is a leading global supplier of automation equipment for test and industrial applications. Teradyne designs, develops, manufactures and sells automatic test systems used to test semiconductors, wireless products, data storage and complex electronics systems in many industries including consumer electronics, wireless, automotive, industrial, computing, communications, and aerospace and defense industries. Teradyne’s industrial automation products include collaborative robotic arms, autonomous mobile robots, and advanced robotic control software used by global manufacturing, logistics and light industrial customers to improve quality, increase manufacturing and material handling efficiency and decrease manufacturing and logistics costs. Teradyne’s automatic test equipment and industrial automation products and services include: • semiconductor test (“Semiconductor Test”) systems; • storage and system level test (“Storage Test”) systems, defense/aerospace (“Defense/Aerospace”) test instrumentation and systems, and circuit-board test and inspection (“Production Board Test”) systems (collectively these products represent “System Test”); • wireless test (“Wireless Test”) systems; and • industrial automation (“Industrial Automation”) products.

Accounting Policies

Accounting Policies	9 Months Ended
	Oct. 02, 2022
Accounting Policies	B. ACCOUNTING POLICIES Basis of Presentation The consolidated interim financial statements include the accounts of Teradyne and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated. These interim financial statements are unaudited and reflect all normal recurring adjustments that are, in the opinion of management, necessary for the fair statement of such interim financial statements. Certain prior year amounts may have been reclassified to conform to the current year presentation. The December 31, 2021 condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by United States of America generally accepted accounting principles (“U.S. GAAP”) for complete financial statements. The accompanying financial information should be read in conjunction with the consolidated financial statements and notes thereto contained in Teradyne’s Annual Report on Form 10-K, Preparation of Financial Statements and Use of Estimates The preparation of consolidated financial statements requires management to make estimates and judgments that affect the amounts of assets, liabilities, revenues and expenses, and related disclosures of contingent liabilities. On an on-going COVID-19 10-Q. Convertible Debt Teradyne adopted Accounting Standards Update (“ASU”) ASU 2020-06 “Debt—Debt with Conversion and Other Options and Derivatives and Hedging—Contracts in Entity’s Own Equity,” . 2020-06, if-converted paid-in

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	9 Months Ended
	Oct. 02, 2022
Recently Issued Accounting Pronouncements	C. RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS For the nine months ended October 2, 2022, there were no

Investment In Other Company

Investment In Other Company	9 Months Ended
	Oct. 02, 2022
Equity Method Investments and Joint Ventures [Abstract]
Investment In Other Company	D. INVESTMENT IN OTHER COMPANY On June 1, 2021, Teradyne invested $12.0 million in MachineMetrics, Inc. (“MachineMetrics”), a private company that develops and sells products to improve manufacturing performance through automated machine data collection, alerting, and analytics. Teradyne’s investment in MachineMetrics aligns with its strategy of providing and investing in leading edge products for automating industrial production processes in growing markets. The investment was recorded at cost and is evaluated for impairment or an indication of changes in fair value resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer on a quarterly basis. At October 2, 2022, the value of the investment was $12.0 million, and there were no changes during the three and nine months ended October 2, 2022.

Revenue

Revenue	9 Months Ended
	Oct. 02, 2022
Revenue from Contract with Customer [Abstract]
Revenue	E. REVENUE Disaggregation of Revenue The following table provides information about disaggregated revenue by timing of revenue recognition, primary geographical market, and major product lines. During the three months ended October 2, 2022 Teradyne combined Mobile Industrial Robots and AutoGuide into one business unit. Revenues for all periods shown below have been combined accordingly. Semiconductor Test Industrial System on-a-Chip Memory System Universal Mobile Wireless Test Corporate and Eliminations Total (in thousands) For the Three Months Ended October 2, 2022 (1) Timing of Revenue Recognition Point in Time $ 383,801 $ 117,943 $ 93,248 $ 71,300 $ 15,025 $ 42,885 $ — $ 724,202 Over Time 66,614 7,346 22,906 2,062 680 3,263 — 102,871 Total $ 450,415 $ 125,289 $ 116,154 $ 73,362 $ 15,705 $ 46,148 $ — $ 827,073 Geographical Market Asia Pacific $ 399,323 $ 122,839 $ 73,768 $ 18,850 $ 2,917 $ 34,420 $ — $ 652,117 Americas 31,719 2,129 35,865 26,515 8,877 9,481 — 114,586 Europe, Middle East and Africa 19,373 321 6,521 27,997 3,911 2,247 — 60,370 Total $ 450,415 $ 125,289 $ 116,154 $ 73,362 $ 15,705 $ 46,148 $ — $ 827,073 For the Three Months Ended October 3, 2021 (1) Timing of Revenue Recognition Point in Time $ 508,747 $ 105,454 $ 88,155 $ 76,008 $ 12,577 $ 65,409 $ (63 ) $ 856,287 Over Time 66,270 7,761 14,450 1,742 687 3,304 — 94,214 Total $ 575,017 $ 113,215 $ 102,605 $ 77,750 $ 13,264 $ 68,713 $ (63 ) $ 950,501 Geographical Market Asia Pacific $ 519,886 $ 110,362 $ 62,757 $ 19,654 $ 2,788 $ 54,344 $ — $ 769,791 Americas 29,119 2,281 34,560 23,429 5,321 11,352 (63 ) 105,999 Europe, Middle East and Africa 26,012 572 5,288 34,667 5,155 3,017 — 74,711 Total $ 575,017 $ 113,215 $ 102,605 $ 77,750 $ 13,264 $ 68,713 $ (63 ) $ 950,501 For the Nine Months Ended October 2, 2022 (2) Timing of Revenue Recognition Point in Time $ 1,102,467 $ 281,456 $ 317,230 $ 234,352 $ 49,570 $ 152,079 $ — $ 2,137,154 Over Time 193,996 21,473 52,295 6,268 2,582 9,441 — 286,055 Total $ 1,296,463 $ 302,929 $ 369,525 $ 240,620 $ 52,152 $ 161,520 $ — $ 2,423,209 Geographical Market Asia Pacific $ 1,153,599 $ 294,986 $ 243,135 $ 54,828 $ 10,826 $ 113,472 $ — $ 1,870,846 Americas 90,148 6,727 105,884 81,857 24,670 36,628 — 345,914 Europe, Middle East and Africa 52,716 1,216 20,506 103,935 16,656 11,420 — 206,449 Total $ 1,296,463 $ 302,929 $ 369,525 $ 240,620 $ 52,152 $ 161,520 $ — $ 2,423,209 Semiconductor Test Industrial System on-a-Chip Memory System Universal Mobile Wireless Test Corporate and Eliminations Total (in thousands) For the Nine Months Ended October 3, 2021 (2) Timing of Revenue Recognition Point in Time $ 1,548,895 $ 291,578 $ 295,666 $ 214,427 $ 41,612 $ 154,908 $ (352 ) $ 2,546,734 Over Time 188,022 21,776 44,595 5,001 2,111 9,596 — 271,101 Total $ 1,736,917 $ 313,354 $ 340,261 $ 219,428 $ 43,723 $ 164,504 $ (352 ) $ 2,817,835 Geographical Market Asia Pacific $ 1,618,117 $ 301,562 $ 223,507 $ 55,531 $ 8,674 $ 133,678 $ — $ 2,341,069 Americas 71,562 9,373 98,475 66,390 17,799 24,228 (352 ) 287,475 Europe, Middle East and Africa 47,238 2,419 18,279 97,507 17,250 6,598 — 189,291 Total $ 1,736,917 $ 313,354 $ 340,261 $ 219,428 $ 43,723 $ 164,504 $ (352 ) $ 2,817,835 (1) Includes $1.8 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 $5.9 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.” Contract Balances During the three and nine months ended October 2, 2022, Teradyne recognized $27.1 million and $87.3 million, respectively, that was previously included within the deferred revenue and customer advances balances at the beginning of the period. During the three and nine months ended October 3, 2021, Teradyne recognized $32.9 million and $82.5 million, respectively, that was previously included within the deferred revenue and customer advances balances. This revenue primarily relates to undelivered hardware, extended warranties, training, application support, and post contract support. Each of these represents a distinct performance obligation. As of October 2, 2022, Teradyne has $1,506 million of unsatisfied performance obligations. Teradyne expects to recognize 88% of the remaining performance obligations in the next 12 months and 12% in 1-3 Deferred revenue and customer advances consist of the following at October 2, 2022 and December 31, 2021, and are included in short and long-term deferred revenue and customer advances on the balance sheet: October 2, December 31, (in thousands) Maintenance, service and training $ 76,310 $ 81,826 Extended warranty 61,920 64,168 Customer advances, undelivered elements and other 53,849 55,112 Total deferred revenue and customer advances $ 192,079 $ 201,106 Accounts Receivable During the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne sold certain trade accounts receivables on a non-recourse

Inventories

Inventories	9 Months Ended
	Oct. 02, 2022
Inventories	F. INVENTORIES Inventories, net consisted of the following at October 2, 2022 and December 31, 2021: October 2, December 31, (in thousands) Raw material $ 228,762 $ 155,641 Work-in-process 42,093 37,740 Finished goods 39,899 49,949 $ 310,754 $ 243,330 Inventory reserves at October 2, 2022 and December 31, 2021 were $124.8 million and $114.1 million, respectively.

Financial Instruments

Financial Instruments	9 Months Ended
	Oct. 02, 2022
Financial Instruments	G. FINANCIAL INSTRUMENTS Cash Equivalents Teradyne considers all highly liquid investments with maturities of three months or less at the date of acquisition to be cash equivalents. Marketable Securities Teradyne’s equity and debt mutual funds are classified as Level 1 and available-for-sale During the three and nine months ended October 2, 2022 and October 3, 2021, there were no transfers in or out of Level 1, Level 2, or Level 3 financial instruments. Realized gains recorded in the three and nine months ended October 2, 2022 were $0.1 million and $0.6 million, respectively. Realized gains recorded in the three and nine months ended October 3, 2021 were $0.5 million and $2.6 million, respectively. Realized losses recorded in the three and nine months ended October 2, 2022 were $0.3 million and $0.9 million, respectively. No realized losses were recorded in the three and nine months ended October 3, 2021. Realized gains and losses are included in other (income) expense, net. Unrealized losses on equity securities recorded in the three and nine months ended October 2, 2022 were $2.3 million and $11.1 million, respectively. No unrealized gains on equity securities were recorded in the three and nine months ended October 2, 2022. Unrealized gains on equity securities recorded in the Unrealized gains and losses on available-for-sale The cost of securities sold is based on average cost. The following table sets forth by fair value hierarchy Teradyne’s financial assets and liabilities that were measured at fair value on a recurring basis as of October 2, 2022 and December 31, 2021. October 2, 2022 Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (in thousands) Assets Cash $ 464,744 $ — $ — $ 464,744 Cash equivalents 51,243 194,759 — 246,002 Available-for-sale U.S. Treasury securities — 65,354 — 65,354 Corporate debt securities — 45,864 — 45,864 Commercial paper — 17,719 — 17,719 Debt mutual funds 6,441 — — 6,441 U.S. government agency securities — 4,681 — 4,681 Certificates of deposit and time deposits — 1,205 — 1,205 Non-U.S. — 512 — 512 Equity securities: Mutual funds 34,573 — — 34,573 $ 557,001 $ 330,094 $ — $ 887,095 Derivative assets — 546 — 546 Total $ 557,001 $ 330,640 $ — $ 887,641 Liabilities Derivative liabilities $ — $ 1,106 $ — $ 1,106 Total $ — $ 1,106 $ — $ 1,106 Reported as follows: (Level 1) (Level 2) (Level 3) Total (in thousands) Assets Cash and cash equivalents $ 515,987 $ 194,759 $ — $ 710,746 Marketable securities — 65,310 — 65,310 Long-term marketable securities 41,014 70,025 — 111,039 Prepayments and other current assets — 546 — 546 Total $ 557,001 $ 330,640 $ — $ 887,641 Liabilities . Other cur r $ — $ 1,106 $ — $ 1,106 Total $ — $ 1,106 $ — $ 1,106 December 31, 2021 Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (in thousands) Assets Cash $ 628,740 $ — $ — $ 628,740 Cash equivalents 412,212 81,247 — 493,459 Available-for-sale — Commercial paper — 189,620 — 189,620 U.S. Treasury securities — 77,789 — 77,789 Corporate debt securities — 56,901 — 56,901 Debt mutual funds 7,971 — — 7,971 U.S. government agency securities — 4,610 — 4,610 Certificates of deposit and time deposits — 1,356 — 1,356 Non-U.S. — 589 — 589 Equity securities: Mutual Funds 39,253 — — 39,253 $ 1,088,176 $ 412,112 $ — $ 1,500,288 Derivative assets — 92 — 92 Total $ 1,088,176 $ 412,204 $ — $ 1,500,380 Liabilities Derivative liabilities — 118 — 118 Total $ — $ 118 $ — $ 118 Reported as follows: (Level 1) (Level 2) (Level 3) Total (in thousands) Assets Cash and cash equivalents $ 1,040,952 $ 81,247 $ — $ 1,122,199 Marketable securities — 244,231 — 244,231 Long-term marketable securities 47,224 86,634 — 133,858 Prepayments and other current assets — 92 — 92 Total $ 1,088,176 $ 412,204 $ — $ 1,500,380 Liabilities Other current liabilities $ — $ 118 $ — $ 118 Total $ — $ 118 $ — $ 118 Changes in the fair value of Level 3 contingent consideration for the nine months ended October 2, 2022, and October 3, 2021 were as follows: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ — $ — $ — $ 7,227 Fair value adjustment (a) — — — (7,227 ) Balance at end of period $ — $ — $ — $ — (a) In the nine months ended October 3, 2021, the fair value of contingent consideration for the earn-outs in connection with the acquisition of AutoGuide was reduced to zero, which resulted in a benefit of $7.2 million, primarily due to a decrease in forecasted revenues and earnings before interest and taxes. On March 25, 2022, the arbitration claim filed by Industrial Automation LLC, sellers of AutoGuide, against Teradyne alleging non-compliance earn-out earn-out The carrying amounts and fair values of Teradyne’s financial instruments at October 2, 2022 and December 31, 2021 were as follows: October 2, 2022 December 31, 2021 Carrying Value Fair Value Carrying Value Fair Value (in thousands) Assets Cash and cash equivalents $ 710,746 $ 710,746 $ 1,122,199 $ 1,122,199 Marketable securities 176,349 176,349 378,089 378,089 Derivative assets 546 546 92 92 Liabilities Derivative liabilities 1,106 1,106 118 118 Convertible debt 64,791 154,486 108,426 604,648 The fair values of accounts receivable, net and accounts payable approximate the carrying value due to the short-term nature of these instruments. The following table summarizes the composition of available-for-sale October 2, 2022 Available-for-Sale Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) U.S. Treasury securities $ 69,598 $ — $ (4,244 ) $ 65,354 $ 65,354 Corporate debt securities 52,926 1 (7,063 ) 45,864 45,622 Commercial paper 17,691 35 (7 ) 17,719 8,983 Debt mutual funds 6,897 — (456 ) 6,441 3,075 U.S. government agency securities 4,790 — (109 ) 4,681 4,681 Certificates of deposit and time deposits 1,205 — — 1,205 — Non-U.S. 512 — — 512 — $ 153,619 $ 36 $ (11,879 ) $ 141,776 $ 127,715 Reported as follows: Cost Unrealized Gain Unrealized (Loss) Fair Market Value Fair Market Value of Investments with Unrealized Losses (in thousands) Marketable securities $ 65,744 $ 35 $ (469 ) $ 65,310 $ 55,369 Long-term marketable securities 87,875 1 (11,410 ) 76,466 72,346 $ 153,619 $ 36 $ (11,879 ) $ 141,776 $ 127,715 The following table summarizes the composition of available-for-sale December 31, 2021 Available-for-Sale Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) Commercial paper $ 189,614 $ 15 $ (9 ) $ 189,620 $ 22,784 U.S. Treasury securities 77,707 551 (470 ) 77,789 46,435 Corporate debt securities 52,266 4,863 (227 ) 56,901 19,422 Debt mutual funds 7,928 43 — 7,971 — U.S. government agency securities 4,617 5 (12 ) 4,610 3,296 Certificates of deposit and time deposits 1,356 — — 1,356 — Non-U.S. 589 — — 589 — $ 334,077 $ 5,477 $ (718 ) $ 338,836 $ 91,937 Reported as follows: Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) Marketable securities $ 244,213 $ 64 $ (46 ) $ 244,231 $ 54,798 Long-term marketable securities 89,864 5,413 (672 ) 94,605 37,139 $ 334,077 $ 5,477 $ (718 ) $ 338,836 $ 91,937 As of October 2, 2022, the fair market value of investments with unrealized losses less than one year and greater than one year totaled $99.7 million and $28.0 million, respectively. As of December 31, 2021, the fair market value of investments with unrealized losses for less than one year and greater than one year totaled $85.4 million and $6.5 million, respectively. Teradyne reviews its investments to identify and evaluate investments that have an indication of possible impairment. Based on this review, Teradyne determined that the unrealized losses related to these investments at October 2, 2022 and December 31, 2021 were not other than temporary. The contractual maturities of investments in available-for-sale October 2, 2022 Cost Fair Market Value (in thousands) Due within one year $ 65,744 $ 65,310 Due after 1 year through 5 years 35,934 34,116 Due after 5 years through 10 years 4,800 4,209 Due after 10 years 40,244 31,700 Total $ 146,722 $ 135,335 Contractual maturities of investments in available-for-sale Derivatives Teradyne conducts business in various foreign countries, with certain transactions denominated in local currencies. As a result, Teradyne is exposed to risks relating to changes in foreign currency exchange rates. Teradyne’s foreign currency risk management objective is to minimize the effect of exchange rate fluctuations associated with the remeasurement of monetary assets and liabilities denominated in foreign currencies, and changes in its cash inflows attributable to the forecasted cash flows from certain foreign currency denominated revenues. To minimize the effect of exchange rate fluctuations associated with the remeasurement of monetary assets and liabilities denominated in foreign currencies, Teradyne enters into foreign currency forward contracts. The change in fair value of these derivatives is recorded directly in earnings and is used to offset the change in value of monetary assets and liabilities denominated in foreign currencies. Teradyne also enters into foreign currency forward and option contracts designated as cash flow hedges to hedge the risk of changes in its cash inflows attributable to changes in foreign currency exchange rates. The cash flow hedges have maturities of less than six months and mature in the period of revenue recognition for certain products and services in b a Teradyne does not use derivative financial instruments for speculative purposes. At October 2, 2022 and December 31, 2021, Teradyne had the following foreign currency forward contracts to buy and sell non-U.S. non-U.S. October 2, 2022 December 31, 2021 Buy Position Sell Position Net Total Buy Position Sell Position Net Total (in millions) Japanese Yen $ (37.5 ) $ — $ (37.5 ) $ (31.4 ) $ — $ (31.4 ) Taiwan Dollar (35.2 ) — (35.2 ) (35.1 ) — (35.1 ) Korean Won (5.4 ) — (5.4 ) (4.2 ) — (4.2 ) British Pound Sterling (1.1 ) — (1.1 ) (1.8 ) — (1.8 ) Danish Krone (0.5 ) — (0.5 ) — — — Singapore Dollar — 24.4 24.4 — 61.9 61.9 Euro — 36.7 36.7 — 44.9 44.9 Philippine Peso — 2.8 2.8 — 3.9 3.9 Chinese Yuan — 2.4 2.4 — 2.8 2.8 Total $ (79.7 ) $ 66.3 $ (13.4 ) $ (72.5 ) $ 113.5 $ 41.0 The fair value of the outstanding foreign currency forward contracts was a loss of $1.1 million and $0.1 million, respectively, at October 2, 2022 and December 31, 2021. Unrealized gains and losses on foreign currency forward contracts and foreign currency remeasurement gains and losses on monetary assets and liabilities are included in other (income) expense, net. At October 2, 2022 and December 31, 2021, Teradyne had the following cash flow hedge contracts to buy and sell non-U.S. October 2, 2022 December 31, 2021 Buy Position Sell Position Net Total Buy Position Sell Position Net Total (in millions) Japanese Yen $ (5.4 ) $ 26.6 $ 21.2 $ — $ — $ — Taiwan Dollar (9.2 ) 18.3 9.1 — — — Total $ (14.6 ) $ 44.9 $ 30.3 $ — $ — $ — The fair value of the outstanding cash flow hedge contracts was a gain of $0.5 million at October 2, 2022. Unrealized gains and losses on foreign currency cash flow hedge contracts are included in accumulated other comprehensive income (loss). At maturity the gains or losses associated with cash flow hedge contracts are recorded to revenue. The following table summarizes the fair value of derivative instruments as of October 2, 2022 and December 31, 2021: Balance Sheet Location October 2, December 31, (in thousands) Derivatives not designated as hedging instruments: Foreign currency forward contracts Prepayments $ 9 $ 92 Foreign currency forward contracts Other current liabilities (1,106 ) (118 ) Derivatives designated as hedging instruments: Foreign currency option contracts Prepayments 537 — Total derivatives $ (560 ) $ (26 ) The following table summarizes the effect of derivative instruments recognized in the statement of operations for the three and nine months ended October 2, 2022 and October 3, 2021: Location of Losses (Gains) Recognized in For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Derivatives not designated as hedging instruments: Foreign currency forward contracts Other (income) expense, net $ 1,246 $ 2,288 $ (2,209 ) $ 5,937 Derivatives designated as hedging instruments: Foreign currency option contracts Revenue — — — — Total derivatives $ 1,246 $ 2,288 $ (2,209 ) $ 5,937 The above table does not reflect the corresponding gains and losses from the remeasurement of the monetary assets and liabilities denominated in foreign currencies. For the three and nine months ended October 2, 2022, net losses from the remeasurement of monetary assets and liabilities denominated in foreign currencies were $1.6 million and $9.5 million, respectively. For the three and nine months ended October 3, 2021, net gains from the remeasurement of monetary assets and liabilities denominated in foreign currencies were $1.0 million and $1.3 million, respectively. See Note H: “Debt” regarding derivatives related to the convertible senior notes.

Debt

Debt	9 Months Ended
	Oct. 02, 2022
Debt	H. DEBT Convertible Senior Notes On December 12, 2016, Teradyne completed a private offering of $460.0 million aggregate principal amount of 1.25 % convertible senior unsecured notes (the “Notes”) due December 15, 2023 and received net proceeds, after issuance costs, of approximately million, of specified corporate events. On or after September 15, 2023 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their Notes at any time, regardless of the foregoing circumstances. Teradyne may satisfy its future conversion obligation by paying cash for the principal amount of the Notes and paying or delivering cash, shares of its common stock or a combination of cash and shares of its common stock, at Teradyne’s election for the amount in excess of principal. As of October 2, 2022, the conversion price was approximately $31.47 per share of Teradyne’s common stock. The conversion rate is subject to adjustment under certain circumstances. As of November 4, 2022, one hundred and sixteen holders had exercised the option to convert $401.8 million worth of notes. Concurrent with the offering of the Notes, Teradyne entered into convertible note hedge transactions (the “Note Hedge Transactions”) with the initial purchasers or their affiliates (the “Option Counterparties”). The Note Hedge Transactions cover, subject to customary anti-dilution adjustments, the number of shares of the common stock that underlie the Notes, with a strike price equal to the conversion price of the Notes of $31.47. Separately and concurrent with the pricing of the Notes, Teradyne entered into warrant transactions with the Option Counterparties (the “Warrant Transactions”) in which it sold net-share-settled The Note Hedge Transactions are expected to reduce the potential dilution to Teradyne’s common stock upon any conversion of the Notes. However, the Warrant Transactions could separately have a dilutive effect to the extent that the market value per share of Teradyne’s common stock exceeds the applicable strike price of the warrant. The net cost of the Note Hedge Transactions, after being partially offset by the proceeds from the sale of the warrants, was approximately $33.0 million. In connection with establishing their initial hedge of these convertible note hedge and warrant transactions, the Option Counterparties have entered into various derivative transactions with respect to Teradyne’s common stock and/or purchased shares of Teradyne’s common stock or other securities, including the Notes, concurrent with, or shortly after, the pricing of the Notes. In addition, the Option Counterparties may modify their hedge positions by entering into or unwinding various derivative transactions with respect to Teradyne’s common stock or by selling Teradyne’s common stock or other securities, including the Notes, in secondary market transactions (and may do so during any observation period related to the conversion of the Notes). These activities could adversely affect the value of Teradyne’s common stock and the Notes. Originally, Teradyne allocated $100.8 million of the $460.0 million principal amount of the Notes to the equity component, which represented a discount to the debt and was amortized to interest expense using the effective interest method through December 2023. Effective January 1, 2022, Teradyne adopted ASC 2020-06 paid-in On November 4, 2021, Teradyne made an irrevocable election under the Indenture to require the principal portion of the remaining Notes to be settled in cash. Debt issuance fees of approximately $0.2 million, at October 2, 2022, are being amortized to interest expense using the effective interest method over the seven-year term of the Notes. The below tables represent the key components of Teradyne’s convertible senior notes: October 2, December 31, (in thousands) Debt principal $ 64,980 $ 116,980 Unamortized debt issuance fees (1) 189 8,554 Net Carrying amount of convertible debt $ 64,791 $ 108,426 Reported as follows: October 2, December 31, (in thousands) Current debt $ 14,596 $ 19,182 Long-term debt 50,195 89,244 Net carrying amount of convertible debt $ 64,791 $ 108,426 For the Three Months For the Nine Months October 2, October 3, October 2, October 3, (in thousands) (in thousands) Contractual interest expense on the coupon $ 159 $ 355 $ 592 $ 2,666 Amortization of debt issuance fees recognized as interest expense (2) 43 2,424 173 9,771 Total interest expense on the convertible debt $ 202 $ 2,779 $ 765 $ 12,437 (1) Unamortized debt issuance fees as of December 31, 2021 include unamortized debt discount of $8.1 million, which was eliminated with the adoption of ASU 2020- 0 (2) Three and nine months ended October 3, 2021 includes the amortization of debt discount component, which was eliminated with the adoption of ASU 2020-06 As of October 2, 2022, the conversion price was approximately $31.47 per share and the if-converted During the nine months ended October 2, 2022, thirty-three debt holders elected to convert $52.0 million of debt principal. The conversion of the debt was settled in cash for principal amount and in shares for the excess of conversion value over principal amount. The 1.2 million shares issued to the debt holders were received from exercising the convertible notes hedge call options. Additional conversions of approximately $14.6 million of debt principal will occur in the fourth quarter of 2022 and the liability is included in current debt. Teradyne expects to make contractual interest payme nts of $0.6 million in the next 12 months and $0.3 million thereafter. Revolving Credit Facility On May 1, 2020, Teradyne entered into a credit agreement (the “Credit Agreement”) with Truist Bank, as administrative agent and collateral agent, and the lenders party thereto. The Credit Agreement provided for a three-year, senior secured revolving credit facility of $400.0 million (the “Credit Facility”). On December 10, 2021, the Credit Agreement was amended to extend the maturity date of the Credit Facility to December 10, 2026. On October 5, 2022, the Credit Agreement was amended to increase the amount of the Credit Facility to $750.0 million from $400.0 million. The Credit Agreement provides that, subject to customary conditions, Teradyne may seek to obtain from existing or new lenders the available incremental amount under the Credit Facility, not to exceed the greater of $ million or % of consolidated EBIDTA. Teradyne is not required to repay any loans under the Credit Facility prior to maturity, subject to certain customary exceptions. Teradyne is permitted to prepay all or any portion of the loans under the Credit Facility prior to maturity without premium or penalty, other than customary SOFR breakage costs. The Credit Agreement contains customary events of default, representations, warranties and affirmative and negative covenants that, among other things, limit Teradyne’s ability to sell assets, grant liens on assets, incur other secured indebtedness and make certain investments and restricted payments, all subject to exceptions set forth in the Credit Agreement. The Credit Agreement also requires Teradyne to satisfy two financial ratios measured as of the end of each fiscal quarter a consolidated leverage ratio and an interest coverage ratio. The Credit Facility is guaranteed by certain of Teradyne’s domestic subsidiaries and collateralized by assets of Teradyne and such subsidiaries, including a pledge of 65% of the capital stock of certain foreign subsidiaries. As of November 4, 2022, Teradyne has not borrowed any funds under the credit facility and was in compliance with all covenants. See Note U: “Subsequent Event” regarding an increase in the amount of the Credit Facility.

Prepayments

Prepayments	9 Months Ended
	Oct. 02, 2022
Prepayments [Abstract]
Prepayments	I. PREPAYMENTS Prepayments consist of the following: October 2, December 31, (in thousands) Contract manufacturer and supplier prepayments $ 466,648 $ 364,478 Prepaid maintenance and other services 13,760 13,660 Prepaid taxes 12,531 15,090 Other prepayments 9,739 13,038 Total prepayments $ 502,678 $ 406,266

Product Warranty

Product Warranty	9 Months Ended
	Oct. 02, 2022
Product Warranties Disclosures [Abstract]
Product Warranty	J. PRODUCT WARRANTY Teradyne generally provides a one-year For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ 16,036 $ 25,676 $ 24,577 $ 16,633 Accruals for warranties issued during the period 4,930 6,641 15,460 28,719 Accruals related to pre-existing (654 ) (963 ) (5,024 ) (3,966 ) Settlements made during the period (6,181 ) (5,233 ) (20,882 ) (15,265 ) Balance at end of period $ 14,131 $ 26,121 $ 14,131 $ 26,121 When Teradyne receives revenue for extended warranties, beyond one year, it is deferred and recognized on a straight-line basis over the contract period. Related costs are expensed as incurred. The balance below is included in short and long-term deferred revenue and customer advances. For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ 65,791 $ 63,525 $ 64,168 $ 51,929 Deferral of new extended warranty revenue 6,987 12,728 28,550 36,533 Recognition of extended warranty deferred revenue (10,858 ) (8,771 ) (30,798 ) (20,980 ) Balance at end of period $ 61,920 $ 67,482 $ 61,920 $ 67,482

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Oct. 02, 2022
Stock-Based Compensation	K. STOCK-BASED COMPENSATION Under Teradyne’s stock compensation plans, Teradyne grants service-based restricted stock units, performance-based restricted stock units and stock options, and employees are eligible to purchase Teradyne’s common stock through its Employee Stock Purchase Plan (“ESPP”). Service-based restricted stock unit awards granted to employees vest in equal annual installments over four years. Restricted stock unit awards granted to non-employee one-year Performance-based restricted stock units (“PRSUs”) granted to Teradyne’s executive officers may have a performance metric based on relative total shareholder return (“TSR”). Teradyne’s three-year TSR performance is measured against the New York Stock Exchange (“NYSE”) Composite Index. The final number of TSR PRSUs that vest will vary based upon the level of performance achieved from 0% to 200% of the target shares. The TSR PRSUs will vest upon the three-year anniversary of the grant date. The TSR PRSUs are valued using a Monte Carlo simulation model. The number of units expected to be earned, based upon the achievement of the TSR market condition, is factored into the grant date Monte Carlo valuation. Compensation expense is recognized on a straight-line basis over the shorter of the three-year service period or the period from the grant to the date described in the retirement provisions below. Compensation expense for executive officers meeting the retirement provisions prior to the grant date is recognized during the year following the grant. Compensation expense is recognized regardless of the eventual number of units that are earned based upon the market condition, provided the executive officer remains an employee at the end of the three-year period. Compensation expense is reversed if at any time during the three-year service period the executive officer is no longer an employee, subject to the retirement and termination eligibility provisions noted below. PRSUs granted to Teradyne’s executive officers may also have a performance metric based on three-year cumulative non-GAAP Non-GAAP non-recurring If a PRSU recipient’s employment ends prior to the determination of the performance percentage due to (1) permanent disability or death or (2) retirement or termination other than for cause, after attaining both at least age sixty Stock options to purchase Teradyne’s common stock at 100% of the fair market value on the grant date vest in equal annual installments over four years from the grant date and have a maximum term of seven years. During the nine months ended October 2, 2022 and October 3, 2021, Teradyne granted 0.4 million and 0.3 million of service-based restricted stock unit awards to employees at a weighted average grant date fair value of $110.34 and $113.76, respectively, and $0.1 million of service-based restricted stock unit awards to non-employee During the nine months ended October 2, 2022 and October 3, 2021, Teradyne granted 0.1 million of PBIT PRSUs with a grant date fair value of $110.84 and $113.65, respectively. Duri ng the nine months ended October 2, 2022 and October 3, 2021, Teradyne granted 0.1 million of TSR PRSUs, with a grant date fair value of $101.06 and $125.02, respectively. The fair value was estimated using the Monte Carlo simulation model with the following assumptions: For the Nine Months Ended October 2, October 3, Risk-free interest rate 1.4 % 0.2 % Teradyne volatility-historical 47.1 % 43.9 % NYSE Composite Index volatility-historical 22.7 % 22.9 % Dividend yield 0.4 % 0.4 % Expected volatility was based on the historical volatility of Teradyne’s stock and the NYSE Composite Index over the most recent three-year period. The risk-free interest rate was determined using the U.S. Treasury yield curve in effect at the time of grant. Dividend yield was based upon an estimated annual dividend amount of $0.44 per share divided by Teradyne’s stock price on the grant date of $112.12 for the 2022 grant and an estimated annual dividend amount of $0.40 per share divided by Teradyne’s stock price on the grant date of $113.48 for the 2021 grant. During the nine months ended October 2, 2022 and October 3, 2021, Teradyne granted 0.1 million of service-based stock options to executive officers at a weighted average grant date fair value of $39.01 and $36.60, respectively. The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions: For the Nine Months Ended October 2, October 3, Expected life (years) 4.0 5.0 Risk-free interest rate 1.6 % 0.4 % Volatility-historical 43.7 % 37.8 % Dividend yield 0.4 % 0.4 % Teradyne determined the stock options’ expected life based upon historical exercise data for executive officers, the age of the executive officers and the terms of the stock option grant. Volatility was determined using historical volatility for a period equal to the expected life. The risk-free interest rate was determined using the U.S. Treasury yield curve in effect at the time of grant. Dividend yield was based upon an estimated annual dividend amount of $0.44 per share divided by Teradyne’s stock price on the grant date of $112.12 for the 2022 grant and an estimated annual dividend amount of $0.40 per share divided by Teradyne’s stock price on the grant date of $113.48 for the 2021 grant.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Oct. 02, 2022
Accumulated Other Comprehensive Income (Loss)	L. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in accumulated other comprehensive income (loss), which are presented net of tax, consist of the following: Foreign Currency Translation Adjustment Unrealized Gains (Losses) on Marketable Securities Unrealized Retirement Plans Service Credit Total (in thousands) Nine Months Ended October 2, 2022 Balance at December 31, 2021, net of tax of $0, $1,055, $0, $(1,128), respectively $ (10,818 ) $ 3,704 $ — $ 1,166 $ (5,948 ) Other comprehensive (loss) gain before reclassifications, net of tax of $0, $(3,570), $0, $0, respectively (66,258 ) (13,491 ) 537 — (79,212 ) Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $48, $0, $(2), respectively — 386 — (5 ) 381 Net current period other comprehensive (loss) gain, net of tax of $0, $(3,522), $0, $(2), respectively (66,258 ) (13,105 ) 537 (5 ) (78,831 ) Balance at October 2, 2022, net of tax of $0, $(2,467), $0, $(1,130), respectively $ (77,076 ) $ (9,401 ) $ 537 $ 1,161 $ (84,779 ) Nine Months Ended October 3, 2021 Balance at December 31, 2020, net of tax of $0, $1,910, $0, $(1,126), respectively $ 25,389 $ 6,954 $ — $ 1,173 $ 33,516 Other comprehensive loss before reclassifications, net of tax of $0, $(516), $0, $0, respectively (26,672 ) (1,952 ) — — (28,624 ) Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(186), $0, $(2), respectively — (670 ) — (5 ) (675 ) Net current period other comprehensive loss, net of tax of $0, $(702), $0, $(2), respectively (26,672 ) (2,622 ) — (5 ) (29,299 ) Balance at October 3, 2021, net of tax of $0, $1,208, $0, $(1,128), respectively $ (1,283 ) $ 4,332 $ — $ 1,168 $ 4,217 Reclassifications out of accumulated other comprehensive income (loss) to the statement of operations for the three and nine months ended October 2, 2022 and October 3, 2021 were as follows: Details about Accumulated Other Comprehensive Income (Loss) Components For the Three Months Ended For the Nine Months Ended Affected Line Item in the Statements of Operations October 2, October 3, October 2, October 3, (in thousands) Available-for-sale Unrealized (losses) gains, net of tax of $11, $65, $(48 ) $ (177 ) $ 229 $ (386 ) $ 670 Other (income) Defined benefit postretirement plan: Amortization of prior service credit, net of tax of $0, $0, $2, $2, respectively 2 2 5 5 (a) Total reclassifications, net of tax of $11, $65, $46, $188, respectively $ (175 ) $ 231 $ (381 ) $ 675 Net income (a) The amortization of prior service credit is included in the computation of net periodic postretirement benefit cost. See Note P: “Retirement Plans.”

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	9 Months Ended
	Oct. 02, 2022
Goodwill and Acquired Intangible Assets	M. GOODWILL AND ACQUIRED INTANGIBLE ASSETS Goodwill Teradyne performs its annual goodwill impairment test as required under the provisions of ASC 350-10, “Intangibles—Goodwill and Other” The changes in the carrying amount of goodwill by reportable segments for the nine months ended October 2, 2022, were as follows: Industrial Automation Wireless Semiconductor System Test Total (in thousands) Balance at December 31, 2021 Goodwill $ 405,971 $ 361,819 $ 262,101 $ 158,699 $ 1,188,590 Accumulated impairment losses — (353,843 ) (260,540 ) (148,183 ) (762,566 ) Total Goodwill 405,971 7,976 1,561 10,516 426,024 Foreign currency translation adjustment (50,126 ) — (99 ) — (50,225 ) Balance at October 2, 2022 Goodwill 355,845 361,819 262,002 158,699 1,138,365 Accumulated impairment losses — (353,843 ) (260,540 ) (148,183 ) (762,566 ) Total Goodwill $ 355,845 $ 7,976 $ 1,462 $ 10,516 $ 375,799 Intangible Assets Teradyne reviews long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheet: Gross Carrying Amount Accumulated Amortization Foreign Net Carrying Amount (in thousands) Balance at October 2, 2022 Developed technology $ 272,547 $ (232,802 ) $ (7,620 ) $ 32,125 Customer relationships 57,739 (50,623 ) 126 7,242 Tradenames and trademarks 59,387 (40,809 ) (2,365 ) 16,213 Total intangible assets $ 389,673 $ (324,234 ) $ (9,859 ) $ 55,580 Balance, December 31, 2021 Developed technology $ 272,547 $ (223,413 ) $ (4,093 ) $ 45,041 Customer relationships 57,739 (48,921 ) 209 9,027 Tradenames and trademarks 59,387 (37,237 ) (583 ) 21,567 Total intangible assets $ 389,673 $ (309,571 ) $ (4,467 ) $ 75,635 Aggregate intangible asset amortization expense was $4.7 million and $14.7 million, respectively, for the three and nine months ended October 2, 2022 and $5.4 million and $16.3 million, respectively, for the three and nine months ended October 3, 2021. Estimated intangible asset amortization expense for each of the five succeeding fiscal years and thereafter is as follows: Year Amortization Expense (in thousands) 2022 $ 4,592 2023 17,922 2024 17,617 2025 10,855 2026 2,262 Thereafter 2,332

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Oct. 02, 2022
Net Income per Common Share	N. NET INCOME PER COMMON SHARE The following table sets forth the computation of basic and diluted net income per common share: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands, except per share amounts) Net income for basic and diluted net income per share $ 183,485 $ 256,718 $ 543,200 $ 790,549 Weighted average common shares-basic 156,364 164,583 159,325 165,690 Effect of dilutive potential common shares: Convertible note hedge warrant shares (1) 8,284 9,819 9,114 9,774 Incremental shares from assumed conversion of convertible notes (2) 1,453 6,464 1,965 8,784 Restricted stock units 564 1,035 673 1,147 Stock options 45 73 56 87 Employee stock purchase plan 23 13 23 10 Dilutive potential common shares 10,369 17,404 11,831 19,802 Weighted average common shares-diluted 166,733 181,987 171,156 185,492 Net income per common share-basic $ 1.17 $ 1.56 $ 3.41 $ 4.77 Net income per common share-diluted $ 1.10 $ 1.41 $ 3.17 $ 4.26 (1) Convertible notes hedge warrant shares were calculated using the difference between the average Teradyne stock price for the period and the warrant price, multiplied by the number of warrant shares. The result of this calculation, representing the total intrinsic value of the warrant, was divided by the average Teradyne stock price for the period. (2) Incremental shares from assumed conversion of the convertible notes were calculated using the difference between the average Teradyne stock price for the period and the conversion price, multiplied by the number of convertible notes shares. The result of this calculation, representing the total intrinsic value of the convertible debt, was divided by the average Teradyne stock price for the period. The computation of diluted net income per common share for the three and nine months ended October 2, 2022 excludes the effect of the potential vesting of 0.7 million and 0.9 million, respectively, of restricted stock units because the effect would have been anti-dilutive. The computation of diluted net income per common share for the three and nine months ended October 3, 2021 excludes the effect of the potential vesting of 0.1 million and 0.1 million, respectively, of restricted stock units because the effect would have been anti-dilutive.

Restructuring and Other

Restructuring and Other	9 Months Ended
	Oct. 02, 2022
Restructuring and Related Activities [Abstract]
Restructuring and Other	O. RESTRUCTURING AND OTHER During the three months ended October 2, 2022, Teradyne recorded $1.2 million of severance charges primarily in Industrial Automation and $0.7 million for an increase in legal liabilities. During the three months ended October 3, 2021, Teradyne recorded $0.6 million of severance charges primarily in Industrial Automation. During the nine months ended October 2, 2022, Teradyne recorded a charge of $14.7 million related to the arbitration claim filed against Teradyne and AutoGuide related to an earn-out earn-out During the nine months ended October 3, 2021, Teradyne recorded a gain of $7.2 million for the decrease in the fair value of the AutoGuide contingent consideration liability, partially offset by a charge of $1.7 million for an increase in environmental and legal liabilities, and $1.2 million of severance charges primarily in Industrial Automation.

Retirement Plans

Retirement Plans	9 Months Ended
	Oct. 02, 2022
Retirement Plans	P. RETIREMENT PLANS ASC 715, “Compensation—Retirement Benefits,” requires an employer with defined benefit plans or other postretirement benefit plans to recognize an asset or a liability on its balance sheet for the overfunded or underfunded status of the plans as defined by ASC 715. The pension asset or liability represents a difference between the fair value of the pension plan’s assets and the projected benefit obligation at December 31. Teradyne uses a December 31 measurement date for all its plans. Defined Benefit Pension Plans Teradyne has defined benefit pension plans covering a portion of domestic employees and employees of certain non-U.S. In the nine months ended October 2, 2022 and October 3, 2021, Teradyne contributed $2.5 million and $2.5 million, respectively, to the U.S. supplemental executive defined benefit pension plan, and $0.7 million and $0.8 million, respectively, to certain qualified pension plans for non-U.S. For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic pension cost was comprised of the following: For the Three Months Ended October 2, 2022 October 3, 2021 United States Foreign United States Foreign (in thousands) Service cost $ 397 $ 153 $ 452 $ 240 Interest cost 1,222 96 1,098 86 Expected return on plan assets (732 ) (16 ) (936 ) (17 ) Total net periodic pension cost $ 887 $ 233 $ 614 $ 309 For the Nine Months Ended October 2, 2022 October 3, 2021 United States Foreign United States Foreign (in thousands) Service cost $ 1,191 $ 539 $ 1,357 $ 720 Interest cost 3,665 333 3,295 257 Expected return on plan assets (2,195 ) (54 ) (2,809 ) (50 ) Net actuarial gain (45 ) — (400 ) — Total net periodic pension cost $ 2,616 $ 818 $ 1,443 $ 927 Postretirement Benefit Plan In addition to receiving pension benefits, Teradyne employees in the United States who meet early retirement eligibility requirements as of their termination dates may participate in Teradyne’s Welfare Plan, which includes medical and dental benefits up to age 65. Death benefits provide a fixed sum to retirees’ survivors and are available to all retirees. Substantially all of Teradyne’s current U.S. employees could become eligible for these benefits, and the existing benefit obligation relates primarily to those employees. For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic postretirement benefit cost (credit) was comprised of the following: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Service cost $ 16 $ 16 $ 48 $ 48 Interest cost 44 43 132 128 Amortization of prior service credit (2 ) (2 ) (7 ) (7 ) Net actuarial loss (gain) — — 54 (228 ) Total net periodic postretirement benefit cost (credit) $ 58 $ 57 $ 227 $ (59 )

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 02, 2022
Commitments and Contingencies	Q. COMMITMENTS AND CONTINGENCIES Purchase Commitments As of October 2, 2022, Teradyne had entered into purchase commitments for certain components and materials. The purchase commitments covered by the agreements aggregate to approximately $887.1 million, of which $808.3 million is for less than one year. Legal Claims Teradyne is subject to various legal proceedings and claims which have arisen in the ordinary course of business such as, but not limited to, patent, employment, commercial and environmental matters. Teradyne believes that it has meritorious defenses against all pending claims and intends to vigorously contest them. While it is not possible to predict or determine the outcomes of any pending claims or to provide possible ranges of losses that may arise, Teradyne believes the potential losses associated with all of these actions are unlikely to have a material adverse effect on its business, financial position or results of operations. On March 8, 2021, Industrial Automation LLC, sellers of AutoGuide, submitted a demand for arbitration against Teradyne and AutoGuide in Wilmington, Delaware alleging that Teradyne and AutoGuide breached certain provisions of the Membership Interests Purchase Agreement (the “Purchase Agreement”), dated as of October 18, 2019, among Industrial Automation LLC, Teradyne and AutoGuide. The arbitration demand sought full acceleration of the maximum earn-out earn-out earn-out Guarantees and Indemnification Obligations Teradyne provides indemnification, to the extent permitted by law, to its officers, directors, employees and agents for liabilities arising from certain events or occurrences, while the officer, director, employee, or agent, is or was serving, at Teradyne’s request in such capacity. Teradyne may enter into indemnification agreements with certain of its officers and directors. With respect to acquisitions, Teradyne provides indemnifications to or assumes indemnification obligations for the current and former directors, officers and employees of the acquired companies in accordance with the acquired companies’ by-laws Teradyne enters into agreements in the ordinary course of business with customers, resellers, distributors, integrators and suppliers. Most of these agreements require Teradyne to defend and/or indemnify the other party against intellectual property infringement claims brought by a third party with respect to Teradyne’s products. From time to time, Teradyne also indemnifies customers and business partners for damages, losses and liabilities they may suffer or incur relating to personal injury, personal property damage, product liability, breach of confidentiality obligations and environmental claims relating to the use of Teradyne’s products and services or resulting from the acts or omissions of Teradyne, its employees, authorized agents or subcontractors. On occasion, Teradyne has also provided guarantees to customers regarding the delivery and performance of its products, in addition to the warranty described below. As a matter of ordinary course of business, Teradyne warrants that its products will substantially perform in accordance with its standard published specifications in effect at the time of delivery. Most warranties have a one-year In addition, in the ordinary course of business, Teradyne provides minimum purchase guarantees to certain vendors to ensure continuity of supply against the market demand. Although some of these guarantees provide penalties for cancellations and/or modifications to the purchase commitments as the market demand decreases, most of the guarantees do not. Therefore, as the market demand decreases, Teradyne re-evaluates With respect to its agreements covering product, business or entity divestitures and acquisitions, Teradyne provides certain representations, warranties and covenants to purchasers and agrees to indemnify and hold such purchasers harmless against breaches of such representations, warranties and covenants. Many of the indemnification claims have a definite expiration date while some remain in force indefinitely. With respect to its acquisitions, Teradyne may, from time to time, assume the liability for certain events or occurrences that took place prior to the date of acquisition. As a matter of ordinary course of business, Teradyne occasionally guarantees certain indebtedness obligations of its subsidiary companies, limited to the borrowings from financial institutions, purchase commitments to certain vendors, and lease commitments to landlords. Based on historical experience and information known as of October 2, 2022 and December 31, 2021, except for product warranty, Teradyne has not recorded any liabilities for these guarantees and obligations because the amount would be immaterial.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 02, 2022
Income Taxes	R. INCOME TAXES A reconciliation of the United States federal statutory corporate tax rate to Teradyne’s effective tax rate was as follows: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, U.S. statutory federal tax rate 21.0 % 21.0 % 21.0 % 21.0 % Non-deductible 1.8 0.8 1.4 0.8 Foreign taxes (0.7 ) (4.4 ) (2.4 ) (4.4 ) Tax credits (2.1 ) (1.9 ) (1.9 ) (1.4 ) International provisions of the U.S. Tax Cuts and Jobs Act of 2017 (1.4 ) (1.5 ) (1.2 ) (1.6 ) Discrete benefit related to equity compensation (0.1 ) (0.1 ) (1.9 ) (1.6 ) Other, net 0.4 (0.1 ) 0.8 (0.1 ) Effective tax rate 18.9 % 13.8 % 15.8 % 12.7 % On a quarterly basis, Teradyne evaluates the realizability of the deferred tax assets by jurisdiction and assesses the need for a valuation allowance. As of October 2, 2022, Teradyne believes that it will ultimately realize the deferred tax assets recorded on the condensed consolidated balance sheet. However, should Teradyne believe that it is more-likely-than-not As of October 2, 2022 and December 31, 2021, Teradyne had $14.8 million and $14.5 million, respectively, of reserves for uncertain tax positions. The $0.3 million net increase in reserves for uncertain tax positions consists of an increase related to U.S. federal research and development credits generated in the current year partially offset by the release of reserves related to prior year loss carryforwards. As of October 2, 2022, Teradyne does not anticipate a material change in the balance of unrecognized tax benefits during the next twelve months. Teradyne recognizes interest and penalties related to income tax matters in income tax expense. As of October 2, 2022 and December 31, 2021, $0.4 million and $0.3 million, respectively, of interest and penalties were accrued for uncertain tax positions. For the nine months ended October 2, 2022 and October 3, 2021, expense s ere Teradyne qualifies for a tax holiday in Singapore by fulfilling the requirements of an agreement with the Singapore Economic Development Board under which certain headcount and spending requirements must be met. The tax savings due to the tax holiday for the nine months ended October 2, 2022 was $9.7 million, or $0.05 per diluted share. The tax savings due to the tax holiday for the nine months ended October 3, 2021 was $23.9 million, or $0.13 per diluted share. In November 2020, Teradyne entered into an agreement with the Singapore Economic Development Board which extended its Singapore tax holiday under substantially similar terms to the agreement which expired on December 31, 2020. The new tax holiday is scheduled to expire on December 31, 2025.

Segment Information

Segment Information	9 Months Ended
	Oct. 02, 2022
Segment Reporting [Abstract]
Segment Information	S. SEGMENT INFORMATION Teradyne has four reportable segments (Semiconductor Test, System Test, Industrial Automation and Wireless Test). Each of the reportable segments is also an individual operating segment. The Semiconductor Test segment includes operations related to the design, manufacturing and marketing of semiconductor test products and services. The System Test segment includes operations related to the design, manufacturing and marketing of products and services for defense/aerospace instrumentation test, storage and system level test, and circuit-board test. The Industrial Automation segment includes operations related to the design, manufacturing and marketing of collaborative robotic arms, autonomous mobile robots and advanced robotic control software. The Wireless Test segment includes operations related to the design, manufacturing and marketing of wireless test products and services. Each operating segment has a segment manager who is accountable to and maintains regular contact with Teradyne’s chief operating decision maker (Teradyne’s chief executive officer) to discuss operating activities, financial results, forecasts, and plans for the segment. Teradyne evaluates performance based on several factors, of which the primary financial measure is business segment income (loss) before income taxes. The accounting policies of the business segments in effect are described in Note B: “Accounting Policies” in Teradyne’s Annual Report on Form 10-K Segment information for the three and nine months ended October 2, 2022 and October 3, 2021 is as follows: Semiconductor Test System Test Industrial Automation Wireless Test Corporate and Eliminations Consolidated (in thousands) Three Months Ended October 2, 2022 Revenues $ 575,704 $ 116,154 $ 89,067 $ 46,148 $ — $ 827,073 Income (loss) before income taxes (1)(2) 182,625 40,201 (3,992 ) 12,647 (5,284 ) 226,197 Total assets (3) 1,366,478 192,684 614,558 110,484 1,035,702 3,319,906 Three Months Ended October 3, 2021 Revenues $ 688,232 $ 102,605 $ 91,014 $ 68,713 $ (63 ) $ 950,501 Income (loss) before income taxes (1)(2) 265,017 31,773 (4,226 ) 31,726 (26,535 ) 297,755 Total assets (3) 1,251,549 147,970 696,792 119,568 1,546,303 3,762,182 Nine Months Ended October 2, 2022 Revenues $ 1,599,392 $ 369,525 $ 292,772 $ 161,520 $ — $ 2,423,209 Income (loss) before income taxes (1)(2) 510,112 135,566 (15,496 ) 56,659 (41,693 ) 645,148 Total assets (3) 1,366,478 192,684 614,558 110,484 1,035,702 3,319,906 Nine Months Ended October 3, 2021 Revenues $ 2,050,271 $ 340,261 $ 263,151 $ 164,504 $ (352 ) $ 2,817,835 Income (loss) before income taxes (1)(2) 778,687 116,788 (14,586 ) 63,810 (38,925 ) 905,774 Total assets (3) 1,251,549 147,970 696,792 119,568 1,546,303 3,762,182 (1) Included in Corporate and Eliminations are: legal and environmental fees, contingent consideration fair value adjustments, interest income, interest expense, severance charges, net foreign exchange gains (losses), acquisition related charges and compensation, pension, intercompany eliminations and for the three and nine months ended October 3, 2021, loss on convertible debt conversions. (2) Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and, for the three and nine months ended October 3, 2021, loss on convertible debt conversions. (3) Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities, and certain other assets. Included in each segment are charges and credits in the following line items in the statements of operations: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Semiconductor Test: Cost of revenues—inventory charge $ 10,829 $ 3,725 $ 13,144 $ 4,959 Industrial Automation: Restructuring and other—employee severance $ 1,074 $ — $ 1,616 $ 965 Cost of revenues—inventory charge — 3,656 1,411 4,941 Restructuring and other—acquisition related expenses and compensation — — — 825 Wireless: Cost of revenues—inventory charge $ 966 $ 679 $ 3,942 $ 1,351 System Test: Cost of revenues—inventory charge $ — $ — $ — $ 524 Corporate and Eliminations: Restructuring and other—other $ 700 $ — $ 2,700 $ 1,846 Restructuring and other—legal settlement charge — — 14,700 — Other (income) expense, net—loss on convertible debt conversions — 20,153 — 25,397 Restructuring and other—AutoGuide contingent consideration adjustment — — — (7,227 ) Restructuring and other—acquisition related expenses and compensation — — — (513 )

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Oct. 02, 2022
Equity [Abstract]
Shareholders' Equity	T. SHAREHOLDERS’ EQUITY Stock Repurchase Program In January 2021, Teradyne’s Board of Directors approved a new repurchase program for up to $2.0 billion of common stock. The total price includes commissions and is recorded as a reduction to retained earnings. Dividend Holders of Teradyne’s common stock are entitled to receive dividends when they are declared by Teradyne’s Board of Directors. In January 2022, May 2022 and August 2022, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.11 per share. Dividend payments for the three and nine months ended October 2, 2022 were $17.1 million and $52.6 million, respectively. In January 2021, May 2021 and August 2021, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.10 per share. Dividend payments for the three and nine months ended October 3, 2021 were $16.4 million and $49.7 million, respectively. While Teradyne declared a quarterly cash dividend and authorized a share repurchase program, it may reduce or eliminate the cash dividend or share repurchase program in the future. Future cash dividends and stock repurchases are subject to the discretion of Teradyne’s Board of Directors which will consider, among other things, Teradyne’s earnings, capital requirements and financial condition.

Subsequent Events

Subsequent Events	9 Months Ended
	Oct. 02, 2022
Subsequent Events	U. SUBSEQUENT EVENT On October 5, 2022, Teradyne amended its existing credit agreement to increase the amount of its senior secured revolving credit facility to $750 million from $400 million.

Accounting Policies (Policies)

Accounting Policies (Policies)	9 Months Ended
	Oct. 02, 2022
Basis of Presentation	Basis of Presentation The consolidated interim financial statements include the accounts of Teradyne and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated. These interim financial statements are unaudited and reflect all normal recurring adjustments that are, in the opinion of management, necessary for the fair statement of such interim financial statements. Certain prior year amounts may have been reclassified to conform to the current year presentation. The December 31, 2021 condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by United States of America generally accepted accounting principles (“U.S. GAAP”) for complete financial statements. The accompanying financial information should be read in conjunction with the consolidated financial statements and notes thereto contained in Teradyne’s Annual Report on Form 10-K,
Preparation of Financial Statements and Use of Estimates	Preparation of Financial Statements and Use of Estimates The preparation of consolidated financial statements requires management to make estimates and judgments that affect the amounts of assets, liabilities, revenues and expenses, and related disclosures of contingent liabilities. On an on-going COVID-19 10-Q.
Convertible Debt	Convertible Debt Teradyne adopted Accounting Standards Update (“ASU”) ASU 2020-06 “Debt—Debt with Conversion and Other Options and Derivatives and Hedging—Contracts in Entity’s Own Equity,” . 2020-06, if-converted paid-in

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Oct. 02, 2022
Revenue from Contract with Customer [Abstract]
Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition	The following table provides information about disaggregated revenue by timing of revenue recognition, primary geographical market, and major product lines. During the three months ended October 2, 2022 Teradyne combined Mobile Industrial Robots and AutoGuide into one business unit. Revenues for all periods shown below have been combined accordingly. Semiconductor Test Industrial System on-a-Chip Memory System Universal Mobile Wireless Test Corporate and Eliminations Total (in thousands) For the Three Months Ended October 2, 2022 (1) Timing of Revenue Recognition Point in Time $ 383,801 $ 117,943 $ 93,248 $ 71,300 $ 15,025 $ 42,885 $ — $ 724,202 Over Time 66,614 7,346 22,906 2,062 680 3,263 — 102,871 Total $ 450,415 $ 125,289 $ 116,154 $ 73,362 $ 15,705 $ 46,148 $ — $ 827,073 Geographical Market Asia Pacific $ 399,323 $ 122,839 $ 73,768 $ 18,850 $ 2,917 $ 34,420 $ — $ 652,117 Americas 31,719 2,129 35,865 26,515 8,877 9,481 — 114,586 Europe, Middle East and Africa 19,373 321 6,521 27,997 3,911 2,247 — 60,370 Total $ 450,415 $ 125,289 $ 116,154 $ 73,362 $ 15,705 $ 46,148 $ — $ 827,073 For the Three Months Ended October 3, 2021 (1) Timing of Revenue Recognition Point in Time $ 508,747 $ 105,454 $ 88,155 $ 76,008 $ 12,577 $ 65,409 $ (63 ) $ 856,287 Over Time 66,270 7,761 14,450 1,742 687 3,304 — 94,214 Total $ 575,017 $ 113,215 $ 102,605 $ 77,750 $ 13,264 $ 68,713 $ (63 ) $ 950,501 Geographical Market Asia Pacific $ 519,886 $ 110,362 $ 62,757 $ 19,654 $ 2,788 $ 54,344 $ — $ 769,791 Americas 29,119 2,281 34,560 23,429 5,321 11,352 (63 ) 105,999 Europe, Middle East and Africa 26,012 572 5,288 34,667 5,155 3,017 — 74,711 Total $ 575,017 $ 113,215 $ 102,605 $ 77,750 $ 13,264 $ 68,713 $ (63 ) $ 950,501 For the Nine Months Ended October 2, 2022 (2) Timing of Revenue Recognition Point in Time $ 1,102,467 $ 281,456 $ 317,230 $ 234,352 $ 49,570 $ 152,079 $ — $ 2,137,154 Over Time 193,996 21,473 52,295 6,268 2,582 9,441 — 286,055 Total $ 1,296,463 $ 302,929 $ 369,525 $ 240,620 $ 52,152 $ 161,520 $ — $ 2,423,209 Geographical Market Asia Pacific $ 1,153,599 $ 294,986 $ 243,135 $ 54,828 $ 10,826 $ 113,472 $ — $ 1,870,846 Americas 90,148 6,727 105,884 81,857 24,670 36,628 — 345,914 Europe, Middle East and Africa 52,716 1,216 20,506 103,935 16,656 11,420 — 206,449 Total $ 1,296,463 $ 302,929 $ 369,525 $ 240,620 $ 52,152 $ 161,520 $ — $ 2,423,209 Semiconductor Test Industrial System on-a-Chip Memory System Universal Mobile Wireless Test Corporate and Eliminations Total (in thousands) For the Nine Months Ended October 3, 2021 (2) Timing of Revenue Recognition Point in Time $ 1,548,895 $ 291,578 $ 295,666 $ 214,427 $ 41,612 $ 154,908 $ (352 ) $ 2,546,734 Over Time 188,022 21,776 44,595 5,001 2,111 9,596 — 271,101 Total $ 1,736,917 $ 313,354 $ 340,261 $ 219,428 $ 43,723 $ 164,504 $ (352 ) $ 2,817,835 Geographical Market Asia Pacific $ 1,618,117 $ 301,562 $ 223,507 $ 55,531 $ 8,674 $ 133,678 $ — $ 2,341,069 Americas 71,562 9,373 98,475 66,390 17,799 24,228 (352 ) 287,475 Europe, Middle East and Africa 47,238 2,419 18,279 97,507 17,250 6,598 — 189,291 Total $ 1,736,917 $ 313,354 $ 340,261 $ 219,428 $ 43,723 $ 164,504 $ (352 ) $ 2,817,835 (1) Includes $1.8 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 $5.9 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.”
Deferred Revenue and Customer Advances	Deferred revenue and customer advances consist of the following at October 2, 2022 and December 31, 2021, and are included in short and long-term deferred revenue and customer advances on the balance sheet: October 2, December 31, (in thousands) Maintenance, service and training $ 76,310 $ 81,826 Extended warranty 61,920 64,168 Customer advances, undelivered elements and other 53,849 55,112 Total deferred revenue and customer advances $ 192,079 $ 201,106

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Oct. 02, 2022
Composition of Inventories, Net	Inventories, net consisted of the following at October 2, 2022 and December 31, 2021: October 2, December 31, (in thousands) Raw material $ 228,762 $ 155,641 Work-in-process 42,093 37,740 Finished goods 39,899 49,949 $ 310,754 $ 243,330

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Oct. 02, 2022
Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis	The following table sets forth by fair value hierarchy Teradyne’s financial assets and liabilities that were measured at fair value on a recurring basis as of October 2, 2022 and December 31, 2021. October 2, 2022 Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (in thousands) Assets Cash $ 464,744 $ — $ — $ 464,744 Cash equivalents 51,243 194,759 — 246,002 Available-for-sale U.S. Treasury securities — 65,354 — 65,354 Corporate debt securities — 45,864 — 45,864 Commercial paper — 17,719 — 17,719 Debt mutual funds 6,441 — — 6,441 U.S. government agency securities — 4,681 — 4,681 Certificates of deposit and time deposits — 1,205 — 1,205 Non-U.S. — 512 — 512 Equity securities: Mutual funds 34,573 — — 34,573 $ 557,001 $ 330,094 $ — $ 887,095 Derivative assets — 546 — 546 Total $ 557,001 $ 330,640 $ — $ 887,641 Liabilities Derivative liabilities $ — $ 1,106 $ — $ 1,106 Total $ — $ 1,106 $ — $ 1,106 Reported as follows: (Level 1) (Level 2) (Level 3) Total (in thousands) Assets Cash and cash equivalents $ 515,987 $ 194,759 $ — $ 710,746 Marketable securities — 65,310 — 65,310 Long-term marketable securities 41,014 70,025 — 111,039 Prepayments and other current assets — 546 — 546 Total $ 557,001 $ 330,640 $ — $ 887,641 Liabilities . Other cur r $ — $ 1,106 $ — $ 1,106 Total $ — $ 1,106 $ — $ 1,106 December 31, 2021 Quoted Prices in Active Markets for Identical Instruments (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (in thousands) Assets Cash $ 628,740 $ — $ — $ 628,740 Cash equivalents 412,212 81,247 — 493,459 Available-for-sale — Commercial paper — 189,620 — 189,620 U.S. Treasury securities — 77,789 — 77,789 Corporate debt securities — 56,901 — 56,901 Debt mutual funds 7,971 — — 7,971 U.S. government agency securities — 4,610 — 4,610 Certificates of deposit and time deposits — 1,356 — 1,356 Non-U.S. — 589 — 589 Equity securities: Mutual Funds 39,253 — — 39,253 $ 1,088,176 $ 412,112 $ — $ 1,500,288 Derivative assets — 92 — 92 Total $ 1,088,176 $ 412,204 $ — $ 1,500,380 Liabilities Derivative liabilities — 118 — 118 Total $ — $ 118 $ — $ 118 Reported as follows: (Level 1) (Level 2) (Level 3) Total (in thousands) Assets Cash and cash equivalents $ 1,040,952 $ 81,247 $ — $ 1,122,199 Marketable securities — 244,231 — 244,231 Long-term marketable securities 47,224 86,634 — 133,858 Prepayments and other current assets — 92 — 92 Total $ 1,088,176 $ 412,204 $ — $ 1,500,380 Liabilities Other current liabilities $ — $ 118 $ — $ 118 Total $ — $ 118 $ — $ 118
Schedule of Changes in Fair Value of Level 3 Contingent Consideration	Changes in the fair value of Level 3 contingent consideration for the nine months ended October 2, 2022, and October 3, 2021 were as follows: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ — $ — $ — $ 7,227 Fair value adjustment (a) — — — (7,227 ) Balance at end of period $ — $ — $ — $ — (a) In the nine months ended October 3, 2021, the fair value of contingent consideration for the earn-outs in connection with the acquisition of AutoGuide was reduced to zero, which resulted in a benefit of $7.2 million, primarily due to a decrease in forecasted revenues and earnings before interest and taxes.
Schedule of Carrying Amounts and Fair Values of Financial Instruments	The carrying amounts and fair values of Teradyne’s financial instruments at October 2, 2022 and December 31, 2021 were as follows: October 2, 2022 December 31, 2021 Carrying Value Fair Value Carrying Value Fair Value (in thousands) Assets Cash and cash equivalents $ 710,746 $ 710,746 $ 1,122,199 $ 1,122,199 Marketable securities 176,349 176,349 378,089 378,089 Derivative assets 546 546 92 92 Liabilities Derivative liabilities 1,106 1,106 118 118 Convertible debt 64,791 154,486 108,426 604,648
Schedule of Available-for-Sale Marketable Securities	The following table summarizes the composition of available-for-sale October 2, 2022 Available-for-Sale Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) U.S. Treasury securities $ 69,598 $ — $ (4,244 ) $ 65,354 $ 65,354 Corporate debt securities 52,926 1 (7,063 ) 45,864 45,622 Commercial paper 17,691 35 (7 ) 17,719 8,983 Debt mutual funds 6,897 — (456 ) 6,441 3,075 U.S. government agency securities 4,790 — (109 ) 4,681 4,681 Certificates of deposit and time deposits 1,205 — — 1,205 — Non-U.S. 512 — — 512 — $ 153,619 $ 36 $ (11,879 ) $ 141,776 $ 127,715 Reported as follows: Cost Unrealized Gain Unrealized (Loss) Fair Market Value Fair Market Value of Investments with Unrealized Losses (in thousands) Marketable securities $ 65,744 $ 35 $ (469 ) $ 65,310 $ 55,369 Long-term marketable securities 87,875 1 (11,410 ) 76,466 72,346 $ 153,619 $ 36 $ (11,879 ) $ 141,776 $ 127,715 The following table summarizes the composition of available-for-sale December 31, 2021 Available-for-Sale Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) Commercial paper $ 189,614 $ 15 $ (9 ) $ 189,620 $ 22,784 U.S. Treasury securities 77,707 551 (470 ) 77,789 46,435 Corporate debt securities 52,266 4,863 (227 ) 56,901 19,422 Debt mutual funds 7,928 43 — 7,971 — U.S. government agency securities 4,617 5 (12 ) 4,610 3,296 Certificates of deposit and time deposits 1,356 — — 1,356 — Non-U.S. 589 — — 589 — $ 334,077 $ 5,477 $ (718 ) $ 338,836 $ 91,937 Reported as follows: Cost Unrealized Gain Unrealized (Loss) Fair Value Fair Market Value of Investments with Unrealized Losses (in thousands) Marketable securities $ 244,213 $ 64 $ (46 ) $ 244,231 $ 54,798 Long-term marketable securities 89,864 5,413 (672 ) 94,605 37,139 $ 334,077 $ 5,477 $ (718 ) $ 338,836 $ 91,937
Contractual Maturities of Investments Held	The contractual maturities of investments in available-for-sale October 2, 2022 Cost Fair Market Value (in thousands) Due within one year $ 65,744 $ 65,310 Due after 1 year through 5 years 35,934 34,116 Due after 5 years through 10 years 4,800 4,209 Due after 10 years 40,244 31,700 Total $ 146,722 $ 135,335
Schedule of Notional Amount of Derivatives	At October 2, 2022 and December 31, 2021, Teradyne had the following foreign currency forward contracts to buy and sell non-U.S. non-U.S. October 2, 2022 December 31, 2021 Buy Position Sell Position Net Total Buy Position Sell Position Net Total (in millions) Japanese Yen $ (37.5 ) $ — $ (37.5 ) $ (31.4 ) $ — $ (31.4 ) Taiwan Dollar (35.2 ) — (35.2 ) (35.1 ) — (35.1 ) Korean Won (5.4 ) — (5.4 ) (4.2 ) — (4.2 ) British Pound Sterling (1.1 ) — (1.1 ) (1.8 ) — (1.8 ) Danish Krone (0.5 ) — (0.5 ) — — — Singapore Dollar — 24.4 24.4 — 61.9 61.9 Euro — 36.7 36.7 — 44.9 44.9 Philippine Peso — 2.8 2.8 — 3.9 3.9 Chinese Yuan — 2.4 2.4 — 2.8 2.8 Total $ (79.7 ) $ 66.3 $ (13.4 ) $ (72.5 ) $ 113.5 $ 41.0
Schedule of Derivative Instruments in Statement of Financial Position at Fair Value	The following table summarizes the fair value of derivative instruments as of October 2, 2022 and December 31, 2021: Balance Sheet Location October 2, December 31, (in thousands) Derivatives not designated as hedging instruments: Foreign currency forward contracts Prepayments $ 9 $ 92 Foreign currency forward contracts Other current liabilities (1,106 ) (118 ) Derivatives designated as hedging instruments: Foreign currency option contracts Prepayments 537 — Total derivatives $ (560 ) $ (26 )
Schedule of Effect of Derivative Instruments on Statement of Operations Recognized	The following table summarizes the effect of derivative instruments recognized in the statement of operations for the three and nine months ended October 2, 2022 and October 3, 2021: Location of Losses (Gains) Recognized in For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Derivatives not designated as hedging instruments: Foreign currency forward contracts Other (income) expense, net $ 1,246 $ 2,288 $ (2,209 ) $ 5,937 Derivatives designated as hedging instruments: Foreign currency option contracts Revenue — — — — Total derivatives $ 1,246 $ 2,288 $ (2,209 ) $ 5,937
Schedule of Foreign Currency Cash Flow Hedges	At October 2, 2022 and December 31, 2021, Teradyne had the following cash flow hedge contracts to buy and sell non-U.S. October 2, 2022 December 31, 2021 Buy Position Sell Position Net Total Buy Position Sell Position Net Total (in millions) Japanese Yen $ (5.4 ) $ 26.6 $ 21.2 $ — $ — $ — Taiwan Dollar (9.2 ) 18.3 9.1 — — — Total $ (14.6 ) $ 44.9 $ 30.3 $ — $ — $ —

Debt (Tables)

Debt (Tables)	9 Months Ended
	Oct. 02, 2022
Components of Convertible Senior Notes	The below tables represent the key components of Teradyne’s convertible senior notes: October 2, December 31, (in thousands) Debt principal $ 64,980 $ 116,980 Unamortized debt issuance fees (1) 189 8,554 Net Carrying amount of convertible debt $ 64,791 $ 108,426 October 2, December 31, (in thousands) Current debt $ 14,596 $ 19,182 Long-term debt 50,195 89,244 Net carrying amount of convertible debt $ 64,791 $ 108,426 For the Three Months For the Nine Months October 2, October 3, October 2, October 3, (in thousands) (in thousands) Contractual interest expense on the coupon $ 159 $ 355 $ 592 $ 2,666 Amortization of debt issuance fees recognized as interest expense (2) 43 2,424 173 9,771 Total interest expense on the convertible debt $ 202 $ 2,779 $ 765 $ 12,437 (1) Unamortized debt issuance fees as of December 31, 2021 include unamortized debt discount of $8.1 million, which was eliminated with the adoption of ASU 2020- 0 (2) Three and nine months ended October 3, 2021 includes the amortization of debt discount component, which was eliminated with the adoption of ASU 2020-06

Prepayments (Tables)

Prepayments (Tables)	9 Months Ended
	Oct. 02, 2022
Prepayments [Abstract]
Schedule of Prepayments and other assets	Prepayments consist of the following: October 2, December 31, (in thousands) Contract manufacturer and supplier prepayments $ 466,648 $ 364,478 Prepaid maintenance and other services 13,760 13,660 Prepaid taxes 12,531 15,090 Other prepayments 9,739 13,038 Total prepayments $ 502,678 $ 406,266

Product Warranty (Tables)

Product Warranty (Tables)	9 Months Ended
	Oct. 02, 2022
Other Accrued Liabilities	Related costs are charged to the warranty accrual as incurred. The balance below is included in other accrued liabilities. For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ 16,036 $ 25,676 $ 24,577 $ 16,633 Accruals for warranties issued during the period 4,930 6,641 15,460 28,719 Accruals related to pre-existing (654 ) (963 ) (5,024 ) (3,966 ) Settlements made during the period (6,181 ) (5,233 ) (20,882 ) (15,265 ) Balance at end of period $ 14,131 $ 26,121 $ 14,131 $ 26,121
Extended Product Warranty of Short and Long-Term Deferred Revenue and Customer Advances	Related costs are expensed as incurred. The balance below is included in short and long-term deferred revenue and customer advances. For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Balance at beginning of period $ 65,791 $ 63,525 $ 64,168 $ 51,929 Deferral of new extended warranty revenue 6,987 12,728 28,550 36,533 Recognition of extended warranty deferred revenue (10,858 ) (8,771 ) (30,798 ) (20,980 ) Balance at end of period $ 61,920 $ 67,482 $ 61,920 $ 67,482

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Oct. 02, 2022
Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards Assumptions	The fair value was estimated using the Monte Carlo simulation model with the following assumptions: For the Nine Months Ended October 2, October 3, Risk-free interest rate 1.4 % 0.2 % Teradyne volatility-historical 47.1 % 43.9 % NYSE Composite Index volatility-historical 22.7 % 22.9 % Dividend yield 0.4 % 0.4 %
Fair Value of Stock Options Using Assumptions	The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions: For the Nine Months Ended October 2, October 3, Expected life (years) 4.0 5.0 Risk-free interest rate 1.6 % 0.4 % Volatility-historical 43.7 % 37.8 % Dividend yield 0.4 % 0.4 %

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Oct. 02, 2022
Changes in Accumulated Other Comprehensive Income	Changes in accumulated other comprehensive income (loss), which are presented net of tax, consist of the following: Foreign Currency Translation Adjustment Unrealized Gains (Losses) on Marketable Securities Unrealized Retirement Plans Service Credit Total (in thousands) Nine Months Ended October 2, 2022 Balance at December 31, 2021, net of tax of $0, $1,055, $0, $(1,128), respectively $ (10,818 ) $ 3,704 $ — $ 1,166 $ (5,948 ) Other comprehensive (loss) gain before reclassifications, net of tax of $0, $(3,570), $0, $0, respectively (66,258 ) (13,491 ) 537 — (79,212 ) Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $48, $0, $(2), respectively — 386 — (5 ) 381 Net current period other comprehensive (loss) gain, net of tax of $0, $(3,522), $0, $(2), respectively (66,258 ) (13,105 ) 537 (5 ) (78,831 ) Balance at October 2, 2022, net of tax of $0, $(2,467), $0, $(1,130), respectively $ (77,076 ) $ (9,401 ) $ 537 $ 1,161 $ (84,779 ) Nine Months Ended October 3, 2021 Balance at December 31, 2020, net of tax of $0, $1,910, $0, $(1,126), respectively $ 25,389 $ 6,954 $ — $ 1,173 $ 33,516 Other comprehensive loss before reclassifications, net of tax of $0, $(516), $0, $0, respectively (26,672 ) (1,952 ) — — (28,624 ) Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(186), $0, $(2), respectively — (670 ) — (5 ) (675 ) Net current period other comprehensive loss, net of tax of $0, $(702), $0, $(2), respectively (26,672 ) (2,622 ) — (5 ) (29,299 ) Balance at October 3, 2021, net of tax of $0, $1,208, $0, $(1,128), respectively $ (1,283 ) $ 4,332 $ — $ 1,168 $ 4,217
Reclassifications Out of Accumulated Other Comprehensive Income to Statements of Operations	Reclassifications out of accumulated other comprehensive income (loss) to the statement of operations for the three and nine months ended October 2, 2022 and October 3, 2021 were as follows: Details about Accumulated Other Comprehensive Income (Loss) Components For the Three Months Ended For the Nine Months Ended Affected Line Item in the Statements of Operations October 2, October 3, October 2, October 3, (in thousands) Available-for-sale Unrealized (losses) gains, net of tax of $11, $65, $(48 ) $ (177 ) $ 229 $ (386 ) $ 670 Other (income) Defined benefit postretirement plan: Amortization of prior service credit, net of tax of $0, $0, $2, $2, respectively 2 2 5 5 (a) Total reclassifications, net of tax of $11, $65, $46, $188, respectively $ (175 ) $ 231 $ (381 ) $ 675 Net income (a) The amortization of prior service credit is included in the computation of net periodic postretirement benefit cost. See Note P: “Retirement Plans.”

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets (Tables)	9 Months Ended
	Oct. 02, 2022
Changes in Carrying Amount of Goodwill by Segment	The changes in the carrying amount of goodwill by reportable segments for the nine months ended October 2, 2022, were as follows: Industrial Automation Wireless Semiconductor System Test Total (in thousands) Balance at December 31, 2021 Goodwill $ 405,971 $ 361,819 $ 262,101 $ 158,699 $ 1,188,590 Accumulated impairment losses — (353,843 ) (260,540 ) (148,183 ) (762,566 ) Total Goodwill 405,971 7,976 1,561 10,516 426,024 Foreign currency translation adjustment (50,126 ) — (99 ) — (50,225 ) Balance at October 2, 2022 Goodwill 355,845 361,819 262,002 158,699 1,138,365 Accumulated impairment losses — (353,843 ) (260,540 ) (148,183 ) (762,566 ) Total Goodwill $ 355,845 $ 7,976 $ 1,462 $ 10,516 $ 375,799
Schedule of Amortizable Intangible Assets	Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheet: Gross Carrying Amount Accumulated Amortization Foreign Net Carrying Amount (in thousands) Balance at October 2, 2022 Developed technology $ 272,547 $ (232,802 ) $ (7,620 ) $ 32,125 Customer relationships 57,739 (50,623 ) 126 7,242 Tradenames and trademarks 59,387 (40,809 ) (2,365 ) 16,213 Total intangible assets $ 389,673 $ (324,234 ) $ (9,859 ) $ 55,580 Balance, December 31, 2021 Developed technology $ 272,547 $ (223,413 ) $ (4,093 ) $ 45,041 Customer relationships 57,739 (48,921 ) 209 9,027 Tradenames and trademarks 59,387 (37,237 ) (583 ) 21,567 Total intangible assets $ 389,673 $ (309,571 ) $ (4,467 ) $ 75,635
Schedule of Estimated Intangible Assets Amortization Expense	Estimated intangible asset amortization expense for each of the five succeeding fiscal years and thereafter is as follows: Year Amortization Expense (in thousands) 2022 $ 4,592 2023 17,922 2024 17,617 2025 10,855 2026 2,262 Thereafter 2,332

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Oct. 02, 2022
Computation of Basic and Diluted Net Income (Loss) Per Common Share	The following table sets forth the computation of basic and diluted net income per common share: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands, except per share amounts) Net income for basic and diluted net income per share $ 183,485 $ 256,718 $ 543,200 $ 790,549 Weighted average common shares-basic 156,364 164,583 159,325 165,690 Effect of dilutive potential common shares: Convertible note hedge warrant shares (1) 8,284 9,819 9,114 9,774 Incremental shares from assumed conversion of convertible notes (2) 1,453 6,464 1,965 8,784 Restricted stock units 564 1,035 673 1,147 Stock options 45 73 56 87 Employee stock purchase plan 23 13 23 10 Dilutive potential common shares 10,369 17,404 11,831 19,802 Weighted average common shares-diluted 166,733 181,987 171,156 185,492 Net income per common share-basic $ 1.17 $ 1.56 $ 3.41 $ 4.77 Net income per common share-diluted $ 1.10 $ 1.41 $ 3.17 $ 4.26 (1) Convertible notes hedge warrant shares were calculated using the difference between the average Teradyne stock price for the period and the warrant price, multiplied by the number of warrant shares. The result of this calculation, representing the total intrinsic value of the warrant, was divided by the average Teradyne stock price for the period. (2) Incremental shares from assumed conversion of the convertible notes were calculated using the difference between the average Teradyne stock price for the period and the conversion price, multiplied by the number of convertible notes shares. The result of this calculation, representing the total intrinsic value of the convertible debt, was divided by the average Teradyne stock price for the period.

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Oct. 02, 2022
Defined Benefit Pension Plans
Net Periodic Pension and Postretirement Benefit Costs	For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic pension cost was comprised of the following: For the Three Months Ended October 2, 2022 October 3, 2021 United States Foreign United States Foreign (in thousands) Service cost $ 397 $ 153 $ 452 $ 240 Interest cost 1,222 96 1,098 86 Expected return on plan assets (732 ) (16 ) (936 ) (17 ) Total net periodic pension cost $ 887 $ 233 $ 614 $ 309 For the Nine Months Ended October 2, 2022 October 3, 2021 United States Foreign United States Foreign (in thousands) Service cost $ 1,191 $ 539 $ 1,357 $ 720 Interest cost 3,665 333 3,295 257 Expected return on plan assets (2,195 ) (54 ) (2,809 ) (50 ) Net actuarial gain (45 ) — (400 ) — Total net periodic pension cost $ 2,616 $ 818 $ 1,443 $ 927
Postretirement Benefit Plans
Net Periodic Pension and Postretirement Benefit Costs	For the three and nine months ended October 2, 2022 and October 3, 2021, Teradyne’s net periodic postretirement benefit cost (credit) was comprised of the following: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Service cost $ 16 $ 16 $ 48 $ 48 Interest cost 44 43 132 128 Amortization of prior service credit (2 ) (2 ) (7 ) (7 ) Net actuarial loss (gain) — — 54 (228 ) Total net periodic postretirement benefit cost (credit) $ 58 $ 57 $ 227 $ (59 )

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Oct. 02, 2022
Reconciliation of Effective Tax Rate	A reconciliation of the United States federal statutory corporate tax rate to Teradyne’s effective tax rate was as follows: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, U.S. statutory federal tax rate 21.0 % 21.0 % 21.0 % 21.0 % Non-deductible 1.8 0.8 1.4 0.8 Foreign taxes (0.7 ) (4.4 ) (2.4 ) (4.4 ) Tax credits (2.1 ) (1.9 ) (1.9 ) (1.4 ) International provisions of the U.S. Tax Cuts and Jobs Act of 2017 (1.4 ) (1.5 ) (1.2 ) (1.6 ) Discrete benefit related to equity compensation (0.1 ) (0.1 ) (1.9 ) (1.6 ) Other, net 0.4 (0.1 ) 0.8 (0.1 ) Effective tax rate 18.9 % 13.8 % 15.8 % 12.7 %

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Oct. 02, 2022
Segment Information	Segment information for the three and nine months ended October 2, 2022 and October 3, 2021 is as follows: Semiconductor Test System Test Industrial Automation Wireless Test Corporate and Eliminations Consolidated (in thousands) Three Months Ended October 2, 2022 Revenues $ 575,704 $ 116,154 $ 89,067 $ 46,148 $ — $ 827,073 Income (loss) before income taxes (1)(2) 182,625 40,201 (3,992 ) 12,647 (5,284 ) 226,197 Total assets (3) 1,366,478 192,684 614,558 110,484 1,035,702 3,319,906 Three Months Ended October 3, 2021 Revenues $ 688,232 $ 102,605 $ 91,014 $ 68,713 $ (63 ) $ 950,501 Income (loss) before income taxes (1)(2) 265,017 31,773 (4,226 ) 31,726 (26,535 ) 297,755 Total assets (3) 1,251,549 147,970 696,792 119,568 1,546,303 3,762,182 Nine Months Ended October 2, 2022 Revenues $ 1,599,392 $ 369,525 $ 292,772 $ 161,520 $ — $ 2,423,209 Income (loss) before income taxes (1)(2) 510,112 135,566 (15,496 ) 56,659 (41,693 ) 645,148 Total assets (3) 1,366,478 192,684 614,558 110,484 1,035,702 3,319,906 Nine Months Ended October 3, 2021 Revenues $ 2,050,271 $ 340,261 $ 263,151 $ 164,504 $ (352 ) $ 2,817,835 Income (loss) before income taxes (1)(2) 778,687 116,788 (14,586 ) 63,810 (38,925 ) 905,774 Total assets (3) 1,251,549 147,970 696,792 119,568 1,546,303 3,762,182 (1) Included in Corporate and Eliminations are: legal and environmental fees, contingent consideration fair value adjustments, interest income, interest expense, severance charges, net foreign exchange gains (losses), acquisition related charges and compensation, pension, intercompany eliminations and for the three and nine months ended October 3, 2021, loss on convertible debt conversions. (2) Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and, for the three and nine months ended October 3, 2021, loss on convertible debt conversions. (3) Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities, and certain other assets.
Schedule of Segment Reporting Information by Segment Charges	Included in each segment are charges and credits in the following line items in the statements of operations: For the Three Months Ended For the Nine Months Ended October 2, October 3, October 2, October 3, (in thousands) Semiconductor Test: Cost of revenues—inventory charge $ 10,829 $ 3,725 $ 13,144 $ 4,959 Industrial Automation: Restructuring and other—employee severance $ 1,074 $ — $ 1,616 $ 965 Cost of revenues—inventory charge — 3,656 1,411 4,941 Restructuring and other—acquisition related expenses and compensation — — — 825 Wireless: Cost of revenues—inventory charge $ 966 $ 679 $ 3,942 $ 1,351 System Test: Cost of revenues—inventory charge $ — $ — $ — $ 524 Corporate and Eliminations: Restructuring and other—other $ 700 $ — $ 2,700 $ 1,846 Restructuring and other—legal settlement charge — — 14,700 — Other (income) expense, net—loss on convertible debt conversions — 20,153 — 25,397 Restructuring and other—AutoGuide contingent consideration adjustment — — — (7,227 ) Restructuring and other—acquisition related expenses and compensation — — — (513 )

Accounting Policies - Additiona

Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 01, 2022	Oct. 02, 2022	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Debt		$ 50,195	$ 89,244
Retained earnings		572,652	736,566
Mezzanine equity			1,512
Additional paid-in capital		$ 1,746,779	$ 1,811,545
Increase Decrease in deferred tax assets	$ 1,800
Teradyne Member [Member]
Summary Of Significant Accounting Policies [Line Items]
Current debt,	1,400
Debt	6,600
Retained earnings	94,600
Mezzanine equity	100,800
Additional paid-in capital	100,800
Teradyne Member [Member] | Accounting Standards Update 2020-06 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Summary Of Significant Accounting Policies [Line Items]
Mezzanine equity	$ 0

Investment In Other Company - A

Investment In Other Company - Additional Information (Details) - MachineMetrics, Inc [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 02, 2022	Oct. 02, 2022	Jun. 01, 2021
Schedule of Equity Method Investments [Line Items]
Long-term Investments	$ 12	$ 12	$ 12
Unrealized Gain (Loss) on Investments	$ 0	$ 0

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Deferred Revenue And Customer Advances	$ 27.1	$ 32.9	$ 87.3	$ 82.5
Deferred Revenue and Trade Accounts Receivable	15.9	$ 66.9	73	$ 81.7
Revenue, Remaining Performance Obligation, Amount	$ 1,506		$ 1,506
Short-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Percentage	88%		88%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period			12 months
Long-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Percentage	12%		12%
Long-term Contract with Customer [Member] | Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period			3 years
Long-term Contract with Customer [Member] | Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period			1 year

Disaggregated Revenue by Primar

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.”

Disaggregated Revenue by Prim_2

Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing of Revenue Recognition (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Accounting Policies [Abstract]
Revenue on leases	$ 1.8	$ 3.8	$ 5.9	$ 11.1

Deferred Revenue and Customer A

Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Jul. 02, 2022	Dec. 31, 2021	Oct. 03, 2021	Jul. 03, 2021	Dec. 31, 2020
Deferred Revenue Arrangement
Maintenance, service and training	$ 76,310		$ 81,826
Extended warranty	61,920	$ 65,791	64,168	$ 67,482	$ 63,525	$ 51,929
Customer advances, undelivered elements and other	53,849		55,112
Total deferred revenue and customer advances	$ 192,079		$ 201,106

Composition of Inventories, Net

Composition of Inventories, Net (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw material	$ 228,762	$ 155,641
Work-in-process	42,093	37,740
Finished goods	39,899	49,949
Inventories, net	$ 310,754	$ 243,330

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Oct. 02, 2022	Dec. 31, 2021
Inventory [Line Items]
Inventory reserves	$ 124.8	$ 114.1

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 25, 2022	Oct. 03, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021	Dec. 31, 2021
Financial Instruments and Fair Value [Line Items]
Available-for-sale securities, realized gain			$ 0.1	$ 0.5	$ 0.6	$ 2.6
Fair market value of investments with unrealized losses greater than one year			28		28		$ 6.5
Fair market value of investments with unrealized losses less than one year			99.7		99.7		85.4
Unrealized Gain (loss) on contracts			1.6	1	9.5	1.3
Equity securities unrealized gain			0		0	3.3
Equity securities unrealized loss			2.3	0.4	11.1	1.1
Available For Sale Securities Gross Realized Loss			0.3	$ 0	0.9	$ 0
Cash Flow Hedging [Member]
Financial Instruments and Fair Value [Line Items]
Other comprehensive income (Loss), cash flow hedge, gain (loss), before reclassification, after tax					0.5
Debt Mutual Funds
Financial Instruments and Fair Value [Line Items]
Available for sale securities with out contractual maturity date			$ 6.4		$ 6.4
TER Auto Guide Llc [Member] | Dispute In Respect Of Contingent Consideration [Member]
Financial Instruments and Fair Value [Line Items]
Litigation Settlement, Amount settled between parties	$ 26.7
Foreign Exchange Contracts
Financial Instruments and Fair Value [Line Items]
Unrealized Gain (loss) on contracts		$ (1.1)					$ (0.1)

Schedule of Fair Value of Finan

Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	$ 141,776	$ 338,836
U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	65,354	77,789
Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	45,864	56,901
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	17,719	189,620
Certificates of Deposit and Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	1,205	1,356
U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	4,681	4,610
Debt Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	6,441	7,971
Non-U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	512	589
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	887,095	1,500,288
Derivative assets	546	92
Total	887,641	1,500,380
Derivative liabilities	1,106	118
Total	1,106	118
Fair Value, Measurements, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	464,744	628,740
Fair Value, Measurements, Recurring | Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	246,002	493,459
Fair Value, Measurements, Recurring | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	65,354	77,789
Fair Value, Measurements, Recurring | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	45,864	56,901
Fair Value, Measurements, Recurring | Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	17,719	189,620
Fair Value, Measurements, Recurring | Certificates of Deposit and Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	1,205	1,356
Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	4,681	4,610
Fair Value, Measurements, Recurring | Debt Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	6,441	7,971
Fair Value, Measurements, Recurring | Non-U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	512	589
Fair Value, Measurements, Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale equity securities	34,573	39,253
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	557,001	1,088,176
Derivative assets	0	0
Total	557,001	1,088,176
Derivative liabilities	0	0
Total	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	464,744	628,740
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	51,243	412,212
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Certificates of Deposit and Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Debt Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	6,441	7,971
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Non-U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Fair Value, Measurements, Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale equity securities	34,573	39,253
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	330,094	412,112
Derivative assets	546	92
Total	330,640	412,204
Derivative liabilities	1,106	118
Total	1,106	118
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	194,759	81,247
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	65,354	77,789
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	45,864	56,901
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	17,719	189,620
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Certificates of Deposit and Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	1,205	1,356
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	4,681	4,610
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Debt Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Non-U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	512	589
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale equity securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total	0	0
Derivative assets	0	0
Total	0	0
Derivative liabilities	0	0
Total	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Certificates of Deposit and Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Debt Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Non-U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale securities	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available for sale equity securities	$ 0	$ 0

Schedule of Reported Financial

Schedule of Reported Financial Assets and Liabilities (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	$ 887,641	$ 1,500,380
Liabilities	1,106	118
Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities	1,106	118
Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	710,746	1,122,199
Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	65,310	244,231
Long-term marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	111,039	133,858
Prepayments and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	546	92
Quoted Prices in Active Markets for Identical Instruments (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	557,001	1,088,176
Liabilities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	515,987	1,040,952
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Long-term marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	41,014	47,224
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Prepayments and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	330,640	412,204
Liabilities	1,106	118
Significant Other Observable Inputs (Level 2) | Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities	1,106	118
Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	194,759	81,247
Significant Other Observable Inputs (Level 2) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	65,310	244,231
Significant Other Observable Inputs (Level 2) | Long-term marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	70,025	86,634
Significant Other Observable Inputs (Level 2) | Prepayments and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	546	92
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Liabilities	0	0
Significant Unobservable Inputs (Level 3) | Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities	0	0
Significant Unobservable Inputs (Level 3) | Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Significant Unobservable Inputs (Level 3) | Long-term marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	0	0
Significant Unobservable Inputs (Level 3) | Prepayments and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets	$ 0	$ 0

Schedule of Changes in Fair Val

Schedule of Changes in Fair Value of Level 3 Contingent Consideration (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period		$ 0	$ 0	$ 0	$ 7,227
Fair value adjustment	[1]	0	0	0	(7,227)
Balance at end of period		$ 0	$ 0	$ 0	$ 0
[1]In the nine months ended October 3, 2021, the fair value of contingent consideration for the earn-outs in connection with the acquisition of AutoGuide was reduced to zero, which resulted in a benefit of $7.2 million, primarily due to a decrease in forecasted revenues and earnings before interest and taxes.

Schedule of Changes in Fair V_2

Schedule of Changes in Fair Value of Level 3 Contingent Consideration (Parenthetical) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Increase (decrease) in contingent consideration	$ 0	$ (7,227)
Autoguide LLC [Member] | Dispute In Respect Of Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Increase (decrease) in contingent consideration		$ 7,200

Schedule of Carrying Amounts an

Schedule of Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Marketable securities	$ 141,776	$ 338,836
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and cash equivalents	710,746	1,122,199
Marketable securities	176,349	378,089
Derivative assets	546	92
Derivative liabilities	1,106	118
Convertible debt	64,791	108,426
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Cash and cash equivalents	710,746	1,122,199
Marketable securities	176,349	378,089
Derivative assets	546	92
Derivative liabilities	1,106	118
Convertible debt	$ 154,486	$ 604,648

Schedule of Available for Sale

Schedule of Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 153,619	$ 334,077
Available-for-sale marketable securities, Unrealized Gain	36	5,477
Available-for-sale marketable securities, Unrealized (Loss)	(11,879)	(718)
Available-for-sale marketable securities, Fair Market Value	141,776	338,836
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	127,715	91,937
U.S. Treasury Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	69,598	77,707
Available-for-sale marketable securities, Unrealized Gain	0	551
Available-for-sale marketable securities, Unrealized (Loss)	(4,244)	(470)
Available-for-sale marketable securities, Fair Market Value	65,354	77,789
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	65,354	46,435
Commercial Paper
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	17,691	189,614
Available-for-sale marketable securities, Unrealized Gain	35	15
Available-for-sale marketable securities, Unrealized (Loss)	(7)	(9)
Available-for-sale marketable securities, Fair Market Value	17,719	189,620
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	8,983	22,784
Corporate Debt Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	52,926	52,266
Available-for-sale marketable securities, Unrealized Gain	1	4,863
Available-for-sale marketable securities, Unrealized (Loss)	(7,063)	(227)
Available-for-sale marketable securities, Fair Market Value	45,864	56,901
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	45,622	19,422
Certificates of Deposit and Time Deposits
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	1,205	1,356
Available-for-sale marketable securities, Fair Market Value	1,205	1,356
U.S. Government Agency Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	4,790	4,617
Available-for-sale marketable securities, Unrealized Gain		5
Available-for-sale marketable securities, Unrealized (Loss)	(109)	(12)
Available-for-sale marketable securities, Fair Market Value	4,681	4,610
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	4,681	3,296
Debt Mutual Funds
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	6,897	7,928
Available-for-sale marketable securities, Unrealized Gain		43
Available-for-sale marketable securities, Unrealized (Loss)	(456)
Available-for-sale marketable securities, Fair Market Value	6,441	7,971
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	3,075
Non-U.S. Government Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	512	589
Available-for-sale marketable securities, Fair Market Value	$ 512	$ 589

Schedule Of Foreign Currency Ca

Schedule Of Foreign Currency Cash Flow Hedges (Details) - USD ($) $ in Millions	Oct. 02, 2022	Dec. 31, 2021
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Asset, Notional Amount	$ 13.4	$ 41
Japan, Yen
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(37.5)	(31.4)
Taiwan, New Dollars
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(35.2)	(35.1)
Short [Member]
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Asset, Notional Amount	66.3	113.5
Long [Member]
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(79.7)	(72.5)
Long [Member] | Japan, Yen
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(37.5)	(31.4)
Long [Member] | Taiwan, New Dollars
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(35.2)	(35.1)
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative, Notional Amount	30.3	0
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member] | Japan, Yen
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative, Notional Amount	21.2	0
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member] | Taiwan, New Dollars
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative, Notional Amount	9.1	0
Foreign Exchange Forward [Member] | Short [Member] | Cash Flow Hedging [Member]
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Asset, Notional Amount	44.9	0
Foreign Exchange Forward [Member] | Short [Member] | Cash Flow Hedging [Member] | Japan, Yen
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Asset, Notional Amount	26.6	0
Foreign Exchange Forward [Member] | Short [Member] | Cash Flow Hedging [Member] | Taiwan, New Dollars
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Asset, Notional Amount	18.3	0
Foreign Exchange Forward [Member] | Long [Member] | Cash Flow Hedging [Member]
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(14.6)	0
Foreign Exchange Forward [Member] | Long [Member] | Cash Flow Hedging [Member] | Japan, Yen
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	(5.4)	0
Foreign Exchange Forward [Member] | Long [Member] | Cash Flow Hedging [Member] | Taiwan, New Dollars
Schedule of Foreign Currency Cash Flow Hedges [Line Items]
Derivative Liability, Notional amounts	$ (9.2)	$ 0

Schedule of Reported Available

Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 153,619	$ 334,077
Available-for-sale marketable securities, Unrealized Gain	36	5,477
Available-for-sale marketable securities, Unrealized (Loss)	(11,879)	(718)
Available-for-sale marketable securities, Fair Market Value	141,776	338,836
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	127,715	91,937
Marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	65,744	244,213
Available-for-sale marketable securities, Unrealized Gain	35	64
Available-for-sale marketable securities, Unrealized (Loss)	(469)	(46)
Available-for-sale marketable securities, Fair Market Value	65,310	244,231
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	55,369	54,798
Long-term marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	87,875	89,864
Available-for-sale marketable securities, Unrealized Gain	1	5,413
Available-for-sale marketable securities, Unrealized (Loss)	(11,410)	(672)
Available-for-sale marketable securities, Fair Market Value	76,466	94,605
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 72,346	$ 37,139

Contractual Maturities of Inves

Contractual Maturities of Investments in Debt Securities Held (Detail) $ in Thousands	Oct. 02, 2022 USD ($)
Schedule of Available-for-sale Securities
Due within one year, cost	$ 65,744
Due after 1 year through 5 years, cost	35,934
Due after 5 years through 10 years, cost	4,800
Due after 10 years, cost	40,244
Total, cost	146,722
Due within one year, fair market value	65,310
Due after 1 year through 5 years, fair market value	34,116
Due after 5 years through 10 years, fair market value	4,209
Due after 10 years, fair maket value	31,700
Total, fair market value	$ 135,335

Schedule of Notional Amount of

Schedule of Notional Amount of Derivatives (Detail) - USD ($) $ in Millions	Oct. 02, 2022	Dec. 31, 2021
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	$ 13.4	$ 41
Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(79.7)	(72.5)
Sell Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	66.3	113.5
Japanese Yen
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(37.5)	(31.4)
Japanese Yen | Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(37.5)	(31.4)
Taiwan Dollar
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(35.2)	(35.1)
Taiwan Dollar | Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(35.2)	(35.1)
Korean Won
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(5.4)	(4.2)
Korean Won | Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(5.4)	(4.2)
British Pound Sterling
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(1.1)	(1.8)
British Pound Sterling | Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(1.1)	(1.8)
Danish Krone
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(0.5)
Danish Krone | Buy Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Liability, Notional amounts	(0.5)
Singapore Dollar
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	24.4	61.9
Singapore Dollar | Sell Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	24.4	61.9
Euro
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	36.7	44.9
Euro | Sell Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	36.7	44.9
Philippines, Pesos
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	2.8	3.9
Philippines, Pesos | Sell Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	2.8	3.9
China, Yuan Renminbi
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	2.4	2.8
China, Yuan Renminbi | Sell Position
Intercompany Foreign Currency Balance [Line Items]
Derivative Asset, Notional amounts	$ 2.4	$ 2.8

Schedule of Derivative Instrume

Schedule of Derivative Instruments in Statement of Financial Position at Fair Value (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), net	$ (560)	$ (26)
Not Designated as Hedging Instrument | Foreign currency forward contracts | Prepayments
Derivatives, Fair Value [Line Items]
Derivative assets	9	92
Not Designated as Hedging Instrument | Foreign currency forward contracts | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	(1,106)	$ (118)
Designated as Hedging Instrument [Member] | Foreign currency forward contracts | Prepayments
Derivatives, Fair Value [Line Items]
Derivative assets	$ 537

Schedule of Effect of Derivativ

Schedule of Effect of Derivative Instruments in Statement of Operations Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 1,246	$ 2,288	$ (2,209)	$ 5,937
Other (income) expense, net | Not Designated as Hedging Instrument [Member] | Foreign Exchange Option [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses (Gains) on derivatives recognized in statements of operations	1,246	2,288	(2,209)	5,937
Sales [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Option [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 0	$ 0	$ 0	$ 0

Debt - Additional Information (

Debt - Additional Information (Detail) $ / shares in Units, $ in Thousands, shares in Millions				9 Months Ended
	Nov. 04, 2022 USD ($)	May 01, 2020 USD ($)	Dec. 12, 2016 USD ($) Day $ / shares shares	Oct. 02, 2022 USD ($) $ / shares shares	Oct. 03, 2021 USD ($) shares	Oct. 05, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument
Repurchase of common stock				$ 750,000	$ 406,180
Repurchase of stock, shares | shares				7.2	3.3
Trading days measurement period | Day			5
Debt issuance costs, amortization period				7 years
Line of Credit Facility, Maximum Borrowing Capacity		$ 400,000
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases				$ 200,000
Line of Credit Facility, Interest Rate Description		The interest rate applicable to loans under the Credit Facility are, at Teradyne’s option, equal to either a base rate plus a margin ranging from 0.00% to 0.75% per annum or SOFR plus a margin ranging from 1.10% to 1.85% per annum, based on the consolidated leverage ratio of Teradyne. In addition, Teradyne will pay a commitment fee on the unused portion of the commitments under the Credit Facility ranging from 0.15% to 0.25% per annum, based on the then applicable consolidated leverage ratio.
Term of revolving credit facility		3 years
Current debt, Conversion				14,596				$ 19,182
Mezzanine equity								1,512
Convertible common shares				52,000
Debt				50,195				89,244
Retained earnings				572,652				736,566
Long Term Debt Maturities Repayments Of Principal Interest Payments In Next Twelve Months				600
Long Term Debt Maturities Repayments Of Principal Intereat Payments Thereafter				$ 300
Available Incremental Amount Under The Credit Facility Not To Exceed Percentage Of Consolidated EBIDTA				15%
Convertible Common Shares [Member]
Debt Instrument
Mezzanine equity				$ 14,600
Shares Issued, Stock Options Exercised				1,200
Subsequent Event [Member]
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity	$ 0
Subsequent Event [Member] | Amended Credit Agreement [Member]
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity						$ 750,000
Collateral Pledged [Member]
Debt Instrument
Line of Credit Facility, Interest Rate Description		65
1.25% Convertible Senior Unsecured Notes Due December 15, 2023
Debt Instrument
Aggregate principal amount			$ 460,000						$ 460,000
Debt instrument, interest rate, stated percentage			1.25%
Debt instrument, net proceeds after issuance costs			$ 450,800
Payment for net cost of convertible note hedges net of warrant proceeds			33,000	$ 33,000
Repurchase of common stock			$ 50,100
Repurchase of stock, shares | shares			2
Debt instrument, frequency of periodic payment			payable semiannually in arrears on June 15 and December 15 of each year.
Debt instrument, date of first required payment			Mar. 31, 2017
Debt instrument, conversion option expiration date			Sep. 15, 2023
Consecutive trading days measurement period | Day			5
Debt instrument conversion price | $ / shares			$ 31.47	$ 31.47
Shares that would be issued upon conversion | shares			14.6
Strike price per share of warrant | $ / shares				$ 39.5
Debt instrument, convertible, carrying amount of equity component								$ 100,800
Debt issuance fees				$ 200
Value of notes converted				$ 155,200
1.25% Convertible Senior Unsecured Notes Due December 15, 2023 | Subsequent Event [Member]
Debt Instrument
Debt instrument conversion converted instrument amount	$ 401,800
1.25% Convertible Senior Unsecured Notes Due December 15, 2023 | Conversion option one
Debt Instrument
Trading days measurement period | Day			20
Consecutive trading days measurement period | Day			30
Percentage of conversion price			130%
1.25% Convertible Senior Unsecured Notes Due December 15, 2023 | Conversion option two
Debt Instrument
Aggregate principal amount			$ 1,000
Percentage of closing sale price of common stock and conversion rate product			98%
Teradyne [Member]
Debt Instrument
Current debt, Conversion							$ 1,400
Mezzanine equity							100,800
Debt							6,600
Retained earnings							94,600
Teradyne [Member] | Accounting Standards Update 2020-06 [Member]
Debt Instrument
Deferred Tax Assets							1,800
Teradyne [Member] | Accounting Standards Update 2020-06 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Debt Instrument
Mezzanine equity							$ 0

Components of Convertible Senio

Components of Convertible Senior Notes (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Debt Instrument
Current debt	$ 14,596	$ 19,182
Long-term debt	50,195	89,244
Net carrying amount of convertible debt	64,791	108,426
Convertible Senior Notes [Member]
Debt Instrument
Debt principal	64,980	116,980
Unamortized debt issuance fees	189	8,554
Net carrying amount of convertible debt	$ 64,791	$ 108,426

Interest Expense on Convertible

Interest Expense on Convertible Senior Notes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Debt Instrument
Contractual interest expense on the coupon	$ 159	$ 355	$ 592	$ 2,666
Amortization of debt issuance fees recognized as interest expense	43	2,424	173	9,771
Total interest expense on the convertible debt	$ 202	$ 2,779	$ 765	$ 12,437

Interest Expense on Convertib_2

Interest Expense on Convertible Senior Notes (Parenthetical) (Detail) $ in Millions	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Unamortized debt discount	$ 8.1

Prepayments (Detail)

Prepayments (Detail) - USD ($) $ in Thousands	Oct. 02, 2022	Dec. 31, 2021
Prepaid And Other Current Assets [Line Items]
Contract manufacturer and supplier prepayments	$ 466,648	$ 364,478
Prepaid maintenance and other services	13,760	13,660
Prepaid taxes	12,531	15,090
Other prepayments	9,739	13,038
Total prepayments	$ 502,678	$ 406,266

Product Warranty (Detail)

Product Warranty (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 16,036	$ 25,676	$ 24,577	$ 16,633
Accruals for warranties issued during the period	4,930	6,641	15,460	28,719
Accruals related to pre-existing warranties	(654)	(963)	(5,024)	(3,966)
Settlements made during the period	(6,181)	(5,233)	(20,882)	(15,265)
Balance at end of period	$ 14,131	$ 26,121	$ 14,131	$ 26,121

Extended Product Warranty of Sh

Extended Product Warranty of Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 65,791	$ 63,525	$ 64,168	$ 51,929
Deferral of new extended warranty revenue	6,987	12,728	28,550	36,533
Recognition of extended warranty deferred revenue	(10,858)	(8,771)	(30,798)	(20,980)
Balance at end of period	$ 61,920	$ 67,482	$ 61,920	$ 67,482

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - $ / shares shares in Millions	3 Months Ended	9 Months Ended
	Oct. 02, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 03, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Stock price	$ 112.12	$ 112.12	$ 113.48	$ 113.48
Stock Options | Measurement Input, Expected Dividend Payment [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Estimated annual dividend amount per share		$ 0.44		0.4
Restricted Stock Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Period of stock granted to employees and executive officers vest in equal annual installments		4 years
Percentage of awards vesting on the first anniversary of grant date	100%
Restricted Stock Units | Director
Share-based Compensation Arrangement by Share-based Payment Award
Period of stock granted to employees and executive officers vest in equal annual installments		1 year
TSR Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Total shareholder return performance measurement period		3 years
Minimum age of retirement to be eligible for PRSUs		60 years
Minimum years of service for retirement to be eligible for PRSUs		10 years
Restricted stock unit awards granted		0.1
Weighted average grant date fair value of restricted stock units granted		$ 101.06	125.02
Stock price	$ 112.12	$ 112.12	113.48	113.48
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of vesting of target shares upon performance achieved	0%
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of vesting of target shares upon performance achieved	200%
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of common stock price paid	100%
PBIT Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Restricted stock unit awards granted		0.1
Weighted average grant date fair value of restricted stock units granted		$ 110.84		$ 113.65
Service-Based Restricted Stock Units | Measurement Input, Expected Dividend Payment [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Estimated annual dividend amount per share		$ 0.44	$ 0.4
Service-Based Restricted Stock Units | Employees
Share-based Compensation Arrangement by Share-based Payment Award
Restricted stock unit awards granted		0.4	0.3
Weighted average grant date fair value of restricted stock units granted		$ 110.34	$ 113.76
Service-Based Restricted Stock Units | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award
Restricted stock unit awards granted		0.1
Service-Based Restricted Stock Units | Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award
Restricted stock unit awards granted		0.1
Weighted average grant date fair value of restricted stock units granted		$ 106.91	127.77
Service Based Stock Options | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award
Weighted average grant date fair value of restricted stock units granted		$ 39.01	$ 36.6

Schedule of Estimated Fair Valu

Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards Assumptions (Detail)	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021
New York Stock Exchange Composite Index
Share-based Compensation Arrangement by Share-based Payment Award
Expected historical volatility	22.70%	22.90%
TSR Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Risk-free interest rate	1.40%	0.20%
Expected historical volatility	47.10%	43.90%
Dividend yield	0.40%	0.40%

Schedule of Estimated Fair Va_2

Schedule of Estimated Fair Value of Stock Options Grant Using Black Scholes Option Pricing Model (Detail) - Stock Options	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Expected life (years)	4 years	5 years
Risk-free interest rate	1.60%	0.40%
Volatility-historical	43.70%	37.80%
Dividend yield	0.40%	0.40%

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 02, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 03, 2021	Oct. 02, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 03, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		$ 2,298,596		$ 2,493,256		$ 2,562,444		$ 2,207,018
Other comprehensive (loss) income		(31,820)		(11,105)		(78,831)		(29,299)
Balance	$ 2,254,125	2,254,125	$ 2,537,493	2,537,493	$ 2,254,125	2,254,125	$ 2,537,493	2,537,493
Foreign Currency Translation Reclassification Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance						(10,818)		25,389
Other comprehensive (loss) gain before reclassifications, net of tax						(66,258)		(26,672)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax						0		0
Other comprehensive (loss) income						(66,258)		(26,672)
Balance	(77,076)	(77,076)	(1,283)	(1,283)	(77,076)	(77,076)	(1,283)	(1,283)
Unrealized Gains (Losses) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance						3,704		6,954
Other comprehensive (loss) gain before reclassifications, net of tax						(13,491)		(1,952)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax						386		(670)
Other comprehensive (loss) income						(13,105)		(2,622)
Balance	(9,401)	(9,401)	4,332	4,332	(9,401)	(9,401)	4,332	4,332
Unrealized Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance						0		0
Other comprehensive (loss) gain before reclassifications, net of tax						537
Amounts reclassified from accumulated other comprehensive income (loss), net of tax						0		0
Other comprehensive (loss) income						537		0
Balance	537	537	0	0	537	537	0	0
Retirement Plans Prior Service Credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance						1,166		1,173
Other comprehensive (loss) gain before reclassifications, net of tax						0		0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(2)		(2)		(5)	(5)	(5)	(5)
Other comprehensive (loss) income						(5)		(5)
Balance	1,161	1,161	1,168	1,168	1,161	1,161	1,168	1,168
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		(52,959)		15,322		(5,948)		33,516
Other comprehensive (loss) gain before reclassifications, net of tax						(79,212)		(28,624)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	175		(231)		381	381	(675)	(675)
Other comprehensive (loss) income		(31,820)		(11,105)		(78,831)		(29,299)
Balance	$ (84,779)	$ (84,779)	$ 4,217	$ 4,217	$ (84,779)	$ (84,779)	$ 4,217	$ 4,217

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss), tax	$ (11)	$ (65)	$ (46)	$ (188)
Foreign currency translation adjustments, tax		0		0	$ 0	$ 0
Unrealized (losses) gains on marketable securities, tax		1,208		1,208	1,055	1,910
Retirement plans prior service benefit, tax		(1,128)		(1,128)	(1,128)	(1,126)
Unrealized Gains on Cash Flow Hedges , tax		0		0	$ 0	$ 0
Foreign Currency Translation Reclassification Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax			0	0
Amounts reclassified from accumulated other comprehensive income (loss), tax			0	0
Other comprehensive income (loss), tax			0	0
Foreign currency translation adjustments, tax	0		0
Unrealized (Losses) Gains on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax			(3,570)	(516)
Amounts reclassified from accumulated other comprehensive income (loss), tax	(11)	(65)	48	(186)
Other comprehensive income (loss), tax			(3,522)	(702)
Unrealized (losses) gains on marketable securities, tax	(2,467)		(2,467)
Unrealized Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax			0	0
Amounts reclassified from accumulated other comprehensive income (loss), tax			0	0
Other comprehensive income (loss), tax			0	0
Unrealized Gains on Cash Flow Hedges , tax	0		0
Retirement Plans Prior Service Credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax			0	0
Amounts reclassified from accumulated other comprehensive income (loss), tax	0	$ 0	(2)	(2)
Other comprehensive income (loss), tax			(2)	$ (2)
Retirement plans prior service benefit, tax	$ (1,130)		$ (1,130)

Reclassifications Out of Accumu

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) to Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 02, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 03, 2021	Oct. 02, 2022	Oct. 02, 2022	Oct. 03, 2021	Oct. 03, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income (expense)	$ (177)	$ (177)	$ 229	$ 229	$ (386)	$ (386)	$ 670	$ 670
Retirement Plans Prior Service Credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax	2		2		5	5	5	5
Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax	$ (175)		$ 231		$ (381)	$ (381)	$ 675	$ 675

Reclassifications Out of Accu_2

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) to Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, tax	$ 11	$ 65	$ 46	$ 188
Unrealized (Losses) Gains on Marketable Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, tax	11	65	(48)	186
Amortization of Prior Service Credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, tax	$ 0	$ 0	$ 2	$ 2

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Goodwill and Intangible Assets Disclosure [Line Items]
Acquired intangible assets amortization	$ 4,729	$ 5,355	$ 14,663	$ 16,293

Changes in Carrying Amount of G

Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,138,365	$ 1,188,590
Accumulated impairment losses	(762,566)	(762,566)
Total goodwill	375,799	426,024
Foreign currency translation adjustment	(50,225)
Industrial Automation
Goodwill [Line Items]
Goodwill	355,845	405,971
Total goodwill	355,845	405,971
Foreign currency translation adjustment	(50,126)
Wireless Test
Goodwill [Line Items]
Goodwill	361,819	361,819
Accumulated impairment losses	(353,843)	(353,843)
Total goodwill	7,976	7,976
Foreign currency translation adjustment	0
Semiconductor Test
Goodwill [Line Items]
Goodwill	262,002	262,101
Accumulated impairment losses	(260,540)	(260,540)
Total goodwill	1,462	1,561
Foreign currency translation adjustment	(99)
System Test
Goodwill [Line Items]
Goodwill	158,699	158,699
Accumulated impairment losses	(148,183)	(148,183)
Total goodwill	10,516	$ 10,516
Foreign currency translation adjustment	$ 0

Schedule of Amortizable Intangi

Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 02, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 389,673	$ 389,673
Accumulated Amortization	(324,234)	(309,571)
Foreign Currency Translation Adjustment	(9,859)	(4,467)
Net Carrying Amount	55,580	75,635
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	272,547	272,547
Accumulated Amortization	(232,802)	(223,413)
Foreign Currency Translation Adjustment	(7,620)	(4,093)
Net Carrying Amount	32,125	45,041
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	57,739	57,739
Accumulated Amortization	(50,623)	(48,921)
Foreign Currency Translation Adjustment	126	209
Net Carrying Amount	7,242	9,027
Trademarks and tradenames
Finite-Lived Intangible Assets
Gross Carrying Amount	59,387	59,387
Accumulated Amortization	(40,809)	(37,237)
Foreign Currency Translation Adjustment	(2,365)	(583)
Net Carrying Amount	$ 16,213	$ 21,567

Schedule of Estimated Intangibl

Schedule of Estimated Intangible Asset Amortization Expense (Detail) $ in Thousands	Oct. 02, 2022 USD ($)
Finite-Lived Intangible Assets
2022	$ 4,592
2023	17,922
2024	17,617
2025	10,855
2026	2,262
Thereafter	$ 2,332

Computation of Basic and Dilute

Computation of Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Net Income Loss Per Common Share
Net income for basic and diluted net income per share		$ 183,485	$ 256,718	$ 543,200	$ 790,549
Weighted average common shares-basic		156,364	164,583	159,325	165,690
Convertible note hedge warrant shares	[1]	8,284	9,819	9,114	9,774
Incremental shares from assumed conversion of convertible notes	[2]	1,453	6,464	1,965	8,784
Employee stock purchase plan		23	13	23	10
Dilutive potential common shares		10,369	17,404	11,831	19,802
Weighted average common shares-diluted		166,733	181,987	171,156	185,492
Net income per common share-basic		$ 1.17	$ 1.56	$ 3.41	$ 4.77
Net income per common share-diluted		$ 1.1	$ 1.41	$ 3.17	$ 4.26
Restricted Stock Units
Net Income Loss Per Common Share
Incremental shares attributable to share based payment arrangements		564	1,035	673	1,147
Stock Options
Net Income Loss Per Common Share
Incremental shares attributable to share based payment arrangements		45	73	56	87
[1]Convertible notes hedge warrant shares were calculated using the difference between the average Teradyne stock price for the period and the warrant price, multiplied by the number of warrant shares. The result of this calculation, representing the total intrinsic value of the warrant, was divided by the average Teradyne stock price for the period.[2]Incremental shares from assumed conversion of the convertible notes were calculated using the difference between the average Teradyne stock price for the period and the conversion price, multiplied by the number of convertible notes shares. The result of this calculation, representing the total intrinsic value of the convertible debt, was divided by the average Teradyne stock price for the period.

Net Income Per Common Share - A

Net Income Per Common Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Net Income Loss Per Common Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.7	0.1	0.9	0.1

Restructuring and Other - Addit

Restructuring and Other - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Mar. 25, 2022	Oct. 02, 2022	Dec. 31, 2021	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Restructuring Cost and Reserve
Increase Decrease in environmental and legal liabilities		$ 700			$ 2,700	$ 1,700
Severance benefit and charges		$ 1,200		$ 600	2,100	1,200
Contingent consideration adjustment					0	(7,227)
Settled Litigation [Member]
Restructuring Cost and Reserve
Legal settlement charges			$ 12,000		$ 14,700
Mobile Industrial Robots (MiR)
Restructuring Cost and Reserve
Contingent consideration adjustment						$ 7,200
TER Corporate And Eliminations | TER Dispute In Respect Of Contingent Consideration [Member]
Restructuring Cost and Reserve
Litigation Settlement, Amount settled between parties	$ 26,700

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail) - United States Plans - Annuity Plan For Participants In The US Qualified Pension Plan [Member] - USD ($) $ in Millions	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021
Defined Benefit Plan Disclosure
Pension benefit obligation acturial gain loss	$ 2.5	$ 2.5
Defined benefit obligation increase decrease for remeasurement due to settlement	$ 0.7	$ 0.8

Schedule of Net Periodic Pensio

Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Defined Benefit Plan Disclosure
Net actuarial loss (gain)			$ 0	$ (627)
UNITED STATES
Defined Benefit Plan Disclosure
Service cost	$ 397	$ 452	1,191	1,357
Interest cost	1,222	1,098	3,665	3,295
Expected return on plan assets	(732)	(936)	(2,195)	(2,809)
Net actuarial loss (gain)			(45)	(400)
Total net periodic pension cost	887	614	2,616	1,443
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	153	240	539	720
Interest cost	96	86	333	257
Expected return on plan assets	(16)	(17)	(54)	(50)
Total net periodic pension cost	233	309	818	927
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	16	16	48	48
Interest cost	44	43	132	128
Amortization of prior service cost	(2)	(2)	(7)	(7)
Net actuarial loss (gain)	0	0	54	(228)
Total net periodic pension cost	$ 58	$ 57	$ 227	$ (59)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	9 Months Ended	12 Months Ended
	Mar. 08, 2021	Mar. 31, 2022	Oct. 02, 2022	Dec. 31, 2021
Purchase Commitment, Excluding Long-term Commitment
Aggregate purchase commitments			$ 887.1
Purchase commitments less than one year			808.3
Product warranty accrual			14.1	$ 24.6
Revenue deferrals related to extended warranties			$ 61.9	$ 64.2
Auto Guide Llc [Member] | Dispute In Respect Of Contingent Consideration [Member]
Purchase Commitment, Excluding Long-term Commitment
Legal claims, damage sought by party	$ 106.9
Litigation Settlement, Amount settled between parties		$ 26.7

Schedule of Reconciliation of E

Schedule of Reconciliation of Effective Tax Rate (Detail)	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Income Tax Disclosure [Line Items]
U.S. statutory federal tax rate	21%	21%	21%	21%
Non-deductible officers' compensation	1.80%	0.80%	1.40%	0.80%
Foreign taxes	(0.70%)	(4.40%)	(2.40%)	(4.40%)
Tax credits	(2.10%)	(1.90%)	(1.90%)	(1.40%)
International provisions of the U.S. Tax Cuts and Jobs Act of 2017	(1.40%)	(1.50%)	(1.20%)	(1.60%)
Discrete benefit related to equity compensation	(0.10%)	(0.10%)	(1.90%)	(1.60%)
Other, net	0.40%	(0.10%)	0.80%	(0.10%)
Effective tax rate	18.90%	13.80%	15.80%	12.70%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Dec. 31, 2021
Income Taxes [Line Items]
Tax savings due to the tax holiday	$ 9.7	$ 23.9
Tax savings due to the tax holiday, per share	$ 0.05	$ 0.13
Accrued interest and penalties	$ 0.4		$ 0.3
Interest and penalties related to income tax, expense (benefit)	0.1	$ 0.3
Uncertain tax positions	14.8		$ 14.5
Net decrease in reserves for uncertain tax positions	$ 0.3

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Oct. 02, 2022 Segment
Segment Reporting Information [Line Items]
Number of Operating Segments	4

Schedule of Segment Information

Schedule of Segment Information (Detail) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Oct. 02, 2022		Oct. 03, 2021		Oct. 02, 2022		Oct. 03, 2021		Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 827,073	[1]	$ 950,501	[1]	$ 2,423,209	[2]	$ 2,817,835
Income (loss) before income taxes	[3],[4]	226,197		297,755		645,148		905,774
Total assets		3,319,906	[5]	3,762,182	[5]	3,319,906	[5]	3,762,182	[5]	$ 3,809,425
Semiconductor Test
Segment Reporting Information [Line Items]
Revenues		575,704		688,232		1,599,392		2,050,271
Income (loss) before income taxes	[3],[4]	182,625		265,017		510,112		778,687
Total assets	[5]	1,366,478		1,251,549		1,366,478		1,251,549
System Test
Segment Reporting Information [Line Items]
Revenues		116,154	[1]	102,605	[1]	369,525	[2]	340,261
Income (loss) before income taxes	[3],[4]	40,201		31,773		135,566		116,788
Total assets	[5]	192,684		147,970		192,684		147,970
Industrial Automation
Segment Reporting Information [Line Items]
Revenues		89,067		91,014		292,772		263,151
Income (loss) before income taxes	[3],[4]	(3,992)		(4,226)		(15,496)		(14,586)
Total assets	[5]	614,558		696,792		614,558		696,792
Wireless Test
Segment Reporting Information [Line Items]
Revenues		46,148	[1]	68,713	[1]	161,520	[2]	164,504
Income (loss) before income taxes	[3],[4]	12,647		31,726		56,659		63,810
Total assets	[5]	110,484		119,568		110,484		119,568
Corporate And Eliminations
Segment Reporting Information [Line Items]
Revenues		0		(63)		0		(352)
Income (loss) before income taxes	[3],[4]	(5,284)		(26,535)		(41,693)		(38,925)
Total assets	[5]	$ 1,035,702		$ 1,546,303		$ 1,035,702		$ 1,546,303
[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.”[3]Included in Corporate and Eliminations are: legal and environmental fees, contingent consideration fair value adjustments, interest income, interest expense, severance charges, net foreign exchange gains (losses), acquisition related charges and compensation, pension, intercompany eliminations and for the three and nine months ended October 3, 2021, loss on convertible debt conversions.[4]Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges and, for the three and nine months ended October 3, 2021, loss on convertible debt conversions.[5]Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities, and certain other assets.

Schedule of Segment Reporting I

Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Segment Reporting Information [Line Items]
Restructuring and other—employee severance	$ 1,796	$ 1,197	$ 19,554	$ (3,426)
Other (income) expense, net - loss on convertible debt conversion	(5,849)	(21,486)	(20,472)	(25,223)
Restructuring and other—AutoGuide contingent consideration adjustment			0	(7,227)
Semiconductor Test
Segment Reporting Information [Line Items]
Cost of revenues - inventory charge	10,829	3,725	13,144	4,959
Industrial Automation
Segment Reporting Information [Line Items]
Cost of revenues - inventory charge	0	3,656	1,411	4,941
Restructuring and other—employee severance	1,074	0	1,616	965
Restructuring and other—acquisition related expenses and compensation				825
Wireless Test
Segment Reporting Information [Line Items]
Cost of revenues - inventory charge	966	679	3,942	1,351
System Test
Segment Reporting Information [Line Items]
Cost of revenues - inventory charge				524
Corporate And Eliminations
Segment Reporting Information [Line Items]
Restructuring and other	700	0	2,700	1,846
Corporate And Eliminations | Restructuring and other
Segment Reporting Information [Line Items]
Restructuring and other—legal settlement charge	0	0	14,700	0
Other (income) expense, net - loss on convertible debt conversion	0	20,153	0	25,397
Restructuring and other—AutoGuide contingent consideration adjustment	0	0	0	(7,227)
Restructuring and other—acquisition related expenses and compensation	$ 0	$ 0	$ 0	$ (513)

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021	Jan. 01, 2022	Jan. 31, 2021
Treasury Stock Amount Due To Be Repurchased			$ 1,350,000
Cumulative repurchases, shares			7.2	3.3
Common stock average price			$ 103.83	$ 123.53
Dividends Payable, Amount Per Share					$ 0.11	$ 0.1
Dividend payment	$ 17,100	$ 16,400	$ 52,578	$ 49,711
Share Repurchase Program [Member]
Treasury Stock Amount Due To Be Repurchased			$ 750,000	$ 406,200
Two Thousand And Twenty One Share Purchase Programme [Member]
Stock repurchase program, authorized amount					$ 2,000,000
Common stock average price			$ 112.55
Treasury Stock, Value	$ 2,000,000		$ 2,000,000
Treasury Stock, Shares	12		12

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions	Nov. 04, 2022	Oct. 05, 2022	May 01, 2020
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 400
Subsequent Event
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 0
Subsequent Event | Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 750