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Stock-Based Compensation (Tables) | 6 Months Ended
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Jul. 02, 2023
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 Six Months Ended |
|  | July 2, |  |  | July 3, |
|  | 2023 |  |  | 2022 |
Risk-free interest rate |  |  | 3.9 | % |  |  | 1.4 | %
Teradyne volatility-historical |  |  | 50.2 | % |  |  | 47.1 | %
NYSE Composite Index volatility-historical |  |  | 24.8 | % |  |  | 22.7 | %
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 Six Months Ended |
|  | July 2, |  |  | July 3, |
|  | 2023 |  |  | 2022 |
Expected life (years) |  |  | 4.0 |  |  |  | 4.0 |
Risk-free interest rate |  |  | 3.7 | % |  |  | 1.6 | %
Volatility-historical |  |  | 46.7 | % |  |  | 43.7 | %
Dividend yield |  |  | 0.4 | % |  |  | 0.4 | %

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- Definition Schedule Of Share Based Payment Award Total Shareholder Return Plan Valuation Assumptions [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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