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Accounting Policies, by Policy (Policies)	6 Months Ended
	Jul. 04, 2026
Basis of Presentation [Abstract]
Fiscal Period, Policy	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 2026 end on April 4, 2026, July 4, 2026, October 3, 2026, and December 31, 2026, respectively.  The four fiscal quarters in 2025 ended on March 29, 2025, June 28, 2025, September 27, 2025, and December 31, 2025, respectively.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation.
Effective Income Tax Rate Description	The provision for income taxes consists of provisions for federal, state, and foreign income taxes.  The effective tax rates for the periods ended July 4, 2026 and June 28, 2025 reflect the Company’s expected tax rate on reported income before income tax and tax adjustments. The Company operates in a global environment with significant operations in various jurisdictions outside the United States. Accordingly, the consolidated income tax rate is a composite rate reflecting the Company’s earnings and the applicable tax rates in the various jurisdictions where the Company operates.
Discussion on convertible debt included in computation of earnings per share diluted	If the average market price of Vishay common stock is less than the effective conversion price of the convertible senior notes due 2030, no shares are included in the diluted earnings (loss) per share computation for the convertible senior notes due 2030.  Pursuant to the indenture governing the convertible senior notes due 2030, Vishay will satisfy its conversion obligations by paying $1 cash per $1 principal amount of converted notes and settle any additional amounts due in cash and/or common stock.  Similarly, the convertible senior notes due 2025 were considered, but not included, in the diluted earnings per share computation for any period presented or any period they were outstanding. In connection with the issuance of the convertible senior notes due 2030, the Company entered into capped call transactions, which were not included in the calculation of diluted earnings per share as their effect would have been anti-dilutive.  The capped calls are intended to reduce the potential dilution to the Company's common stock in the event that at the time of conversion of the convertible senior notes due 2030 the Company's common stock price exceeds the conversion price of the convertible senior notes due 2030.

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Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

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Disclosure of accounting policy for reclassification affecting comparability of financial statement. Excludes amendment to accounting standards, other change in accounting principle, and correction of error.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 205
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Description on effective income tax rate during the reporting period.

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