Basis of Presentation	3 Months Ended
Basis of Presentation	Apr. 03, 2021
Basis of Presentation [Abstract]
Basis of Presentation	Note 1 – Basis of Presentation The accompanying unaudited consolidated condensed financial statements of Vishay Intertechnology, Inc. (“Vishay” or the “Company”) have been prepared in accordance with the instructions to Form 10-Q and therefore do not include all information and footnotes necessary for presentation of financial position, results of operations, and cash flows required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements. The information furnished reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair summary of the financial position, results of operations, and cash flows for the interim periods presented. The financial statements should be read in conjunction with the consolidated financial statements filed with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. The results of operations for the fiscal quarter and three fiscal months ended April 3, 2021 are not necessarily indicative of the results to be expected for the full year. The Company reports interim financial information for 13-week periods beginning on a Sunday and ending on a Saturday, except for the first fiscal quarter, which always begins on January 1, and the fourth fiscal quarter, which always ends on December 31. The four fiscal quarters in 2021 end on April 3, 2021, July 3, 2021, October 2, 2021, and December 31, 2021, respectively. The four fiscal quarters in 2020 ended on April 4, 2020, July 4, 2020, October 3, 2020, and December 31, 2020, respectively. Recently Adopted Accounting Guidance In August 2020, the Financial Accounting Standards Board ("FASB") issued ASU No. 2020-06, Debt – Debt With Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. The ASU simplifies the accounting for certain financial instruments with characteristics of liability and equity, including convertible debt instruments. The ASU reduces the number of accounting models available for convertible debt instruments, requires the use of the if-converted method for the calculation of diluted earnings per share for convertible debt instruments, and increases disclosure requirements. The Company adopted the ASU effective January 1, 2021 using a modified retrospective approach. Upon adoption, Company recorded a $66,078 decrease in additional paid in capital from the derecognition of the bifurcated equity component of the convertible debt instruments, a $59,246 increase in debt from the derecognition of the discount associated with the bifurcated equity component of the convertible debt instruments and a $20,566 increase to the opening balance of retained earnings, representing the cumulative interest expense, net of tax effects, recognized related to the amortization of the bifurcated conversion option. The adoption of the ASU did not have a significant impact on the diluted sharecount due to Vishay exercising existing rights to legally amend the indenture governing the convertible senior notes due 2025. See Note 5. Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation.