Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] 6.625% Senior notes, due September 2027 Senior Notes Due September 2027 [Member] Senior Notes Due September 2027 [Member] Schedule of accrued expenses Schedule of Accrued Liabilities [Table Text Block] Accrued expenses Total accrued expenses Accrued Liabilities, Current Credit facility, borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Research and development Research and Development Expense Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Debt funds Mutual and Commingled Debt Funds [Member] Mutual and Commingled Debt Funds Schedule of revenue from external customers by products and services Revenue from External Customers by Products and Services [Table Text Block] Award Type [Domain] Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Revenue, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Payments of short-term debt Repayments of Short-Term Debt Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Other non-current liabilities Deferred Income Tax Liabilities, Net Foreign derived intangible income Effective Income Tax Rate Reconciliation, FDII, Percent Insider Trading Policies and Procedures [Line Items] Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Five Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Dividends Equity [Text Block] Fully vested and expected to vest (in dollars) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Schedule of net sales by country, and property, plant and equipment by physical location Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Other assets Increase (Decrease) in Other Noncurrent Assets Plans with underfunded or non-funded projected benefit obligation: Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] Director Director [Member] Customer [Axis] Customer [Axis] Schedule of assumptions used Defined Benefit Plan, Assumptions [Table Text Block] Current liabilities: Liabilities, Current [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued Preferred Stock, Value, Issued Cash dividends declared Dividends, Cash Forfeited or expired (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Payments of dividends Payments of Ordinary Dividends, Common Stock Diluted (in dollars per share) Earnings Per Share, Diluted Accounts receivable, net of allowances of $8,114 and $365, respectively Accounts Receivable, after Allowance for Credit Loss, Current Rate of compensation increase for determining benefit obligations at December 31 (as a percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Automotive, industrial and other (ADAS, electrification, infotainment, safety) Sales Channel, Automotive, Industrial And Other [Member] Sales Channel, Automotive, Industrial And Other [Member] Line of Credit Line of Credit [Member] Schedule of interest rates Schedule of Long-Term Interest Rates [Table Text Block] Schedule of Long-Term Interest Rates [Table Text Block] Schedule of components of net periodic pension cost Schedule of Net Benefit Costs [Table Text Block] Components of the provision (benefit) for income taxes Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Trading Symbol Trading Symbol Foreign government bonds Foreign Government Short-Term Debt Securities [Member] U.S. government agency bonds US Government Agencies Debt Securities [Member] Korean won Korea (South), Won Receivable Deferred Tax Assets, Other Deferred Liabilities Deferred Tax Assets, Other Deferred Liabilities Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Term loan, fixed rate at 1.59%, due December 2027 Term Loan Fixed Rate At 1.59% Due December 2027 [Member] Term Loan Fixed Rate At 1.59% Due December 2027 U.S. Foreign Tax Credits Foreign Tax Credit Carryforward [Member] Foreign Tax Credit Carryforward [Member] Award vesting percentage of target grant amount Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Percentage Of Target Grant Amount Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Percentage Of Target Grant Amount Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Machinery and equipment Machinery and equipment Machinery and Equipment [Member] Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid All Currencies [Domain] All Currencies [Domain] Second Largest Customer Second Largest Customer [Member] Second Largest Customer Short-term investments, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Current Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Equity, Attributable to Parent [Abstract] Schedule of unrecognized tax benefits rollforward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) Senior Secured Revolving Credit Facility Due March 2027 [Member] Senior Secured Revolving Credit Facility Due March 2027 Contract with customer, liability Contract with Customer, Liability Schedule of Computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Service cost Service cost Defined Benefit Plan, Service Cost Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Executive Category: Executive Category [Axis] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Level 1 Fair Value, Inputs, Level 1 [Member] Period of earned awards become vested Share-Based Compensation Arrangement By Share-Based Payment Award, Period Of Earned Awards Become Vested Share-Based Compensation Arrangement By Share-Based Payment Award, Period Of Earned Awards Become Vested Total deferred tax assets net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Carrying Value Reported Value Measurement [Member] Taiwan retirement fund Taiwan Retirement Fund [Member] Taiwan Retirement Fund [Member] Schedule of property, plant and equipment Property, Plant and Equipment [Table Text Block] Statement, Equity Components [Axis] Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Accrued expenses Increase (Decrease) in Accrued Liabilities Certificate of deposits Certificates of Deposit [Member] Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Accrued severance plan obligations (Note 12) Supplemental Unemployment Benefits, Severance Benefits 2025 Long-Term Debt, Maturity, Year Two Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Entity Small Business Entity Small Business Local Phone Number Local Phone Number Recovery of Erroneously Awarded Compensation Disclosure [Line Items] 2028 Finance Lease, Liability, to be Paid, Year Five Remaining lease term Lease, Remaining Lease Term Lease, Remaining Lease Term Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) Revolving Credit Facility Due December 2024 [Member] Revolving Credit Facility due December 2024 [Member] Description of Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other Postretirement Benefit Plans [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Depreciation expense Depreciation Retirement Benefits [Abstract] Fair Value Measurement Portion at Fair Value Measurement [Member] Other Other Nonoperating Income (Expense), Net The net of miscellaneous income and expense items that are combined together as a component of Other Nonoperating Income (Expense). Treasury stock acquired through surrender of shares for tax withholding Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Income taxes payable Accrued Income Taxes, Current Consolidation of Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Schedule of Antidilutive effect of potential shares of common stock that were excluded from diluted earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Share-based awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Award Type [Axis] Award Type [Axis] Awards granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Total property, plant and equipment Property, Plant and Equipment, Gross Right of use assets acquired through operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Valuation Allowance [Line Items] Valuation Allowance [Line Items] Leases Lessee, Finance Leases [Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Schedule of components of income tax provision (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Short-term operating lease liability Operating Lease, Liability, Current Interest on lease liabilities Finance Lease, Interest Expense 2026 Lessee, Operating Lease, Liability, to be Paid, Year Three Increase of quarterly dividends, percentage Common Stock, Dividends, Increase (Decrease) Common Stock, Dividends, Increase (Decrease) Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Recently Issued Standards New Accounting Pronouncements, Policy [Policy Text Block] Valuation Allowance of Deferred Tax Assets SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Expected contributions in next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Unbilled receivables Unbilled Receivables, Current Factoring of Accounts Receivable [Table] Factoring of Accounts Receivable [Table] Factoring of Accounts Receivable [Table] Notional Value Derivative Asset, Notional Amount 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Total financial instruments Debt Instrument, Fair Value Disclosure Schedule of income (loss) before income tax, domestic and foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Proceeds from sale of cash equivalent investments Proceeds From Sale Of Cash Equivalent Investments Proceeds From Sale Of Cash Equivalent Investments Gross profit Gross Profit Contract with customer, liability, current Deferred revenue and customer advances Contract with Customer, Liability, Current Balance at beginning of the year Balance at the end of year Deferred Compensation Cash-Based Arrangements, Liability, Current and Noncurrent Security Exchange Name Security Exchange Name Selling, general and administrative Selling, General and Administrative Expense Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Net gain (loss) arising during period Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Stock Options Employee Stock Option [Member] Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Investments Investment, Policy [Policy Text Block] Pension and severance obligations Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent Settlement (gain) loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Maximum Maximum [Member] Cash equivalents, amortized cost Cash Equivalents, at Carrying Value Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Settlement Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement Tabular List, Table Tabular List [Table Text Block] Europe, Middle East and Africa EMEA [Member] Thereafter Long-Term Debt, Maturity, after Year Five Inventories Inventory, Policy [Policy Text Block] Other Current Assets Other Current Assets, Policy [Policy Text Block] Other Current Assets, Policy 2026 Finance Lease, Liability, to be Paid, Year Three Foreign currency (gain) loss Severance Benefits, Gain (Loss) Translation Adjustments Foreign currency translation adjustments related to the transactions for lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. Share-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Federal Current Federal Tax Expense (Benefit) Other, net Other Noncash Income (Expense) Term loan, fixed rate at 1.20%, due December 2025 Term Loan, Fixed Rate at 1.20% Due December 2025 [Member] Term Loan, Fixed Rate at 1.20% Due December 2025 Allowance Accounts Receivable, Allowance for Credit Loss, Current Term Loans, SOFR Plus 1.40%, Due December 2026 Term Loans, SOFR Plus 1.40%, Due December 2026 [Member] Term Loans, SOFR Plus 1.40%, Due December 2026 Schedule of Significant Accounting Policies [Line Items] Schedule of Significant Accounting Policies [Line Items] Schedule of Significant Accounting Policies [Line Items] Customer Concentration Risk Customer Concentration Risk [Member] State Deferred State and Local Income Tax Expense (Benefit) Variable Rate [Axis] Variable Rate [Axis] Effects of curtailment Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment Net operating lease ROU asset Increase (Decrease) In Operating Lease Right-of-use Assets, Net Increase (Decrease) In Operating Lease Right-of-use Assets, Net Title of 12(b) Security Title of 12(b) Security Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Actuarial (gain) loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Capital expenditures payable Capital Expenditures Payable Amount owed for capital expenditures. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Equity funds Mutual and Commingled Equity Funds [Member] Mutual and Commingled Equity Funds Nonvested beginning balance (in dollars per share) Nonvested ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Mainstream Products Mainstream Products [Member] Mainstream Products [Member] Net lease cost Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Other current assets Increase (Decrease) in Other Current Assets Entity Interactive Data Current Entity Interactive Data Current Total, fair value Debt Securities, Available-For-Sale, And Cash Equivalents, Fair Value Disclosure Debt Securities, Available-For-Sale, And Cash Equivalents, Fair Value Disclosure Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Subsidiary Term Loans Subsidiary Term Loans [Member] Subsidiary Term Loans [Member] Goodwill Goodwill and Intangible Assets, Policy [Policy Text Block] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Amount of leases not yet commenced Lessee, Lease Not Yet Commenced, Liability Lessee, Lease Not Yet Commenced, Liability Measure: Measure [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] U.S. Other Tax Credits Other Tax Credit Carryforward [Member] Other Tax Credit Carryforward [Member] Schedule of financial instruments that are not recorded at fair value Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Derivatives Derivatives, Policy [Policy Text Block] Guaranteed investment contracts Foreign Guaranteed Investment Contract [Member] Foreign Guaranteed Investment Contract [Member] Foreign exchange (loss) gain Effective Income Tax Reconciliation, Foreign Exchange Gain (Loss), Percent The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations that is attributable to gains or losses on foreign exchange. Settlement Defined Benefit Plan, Plan Assets, Payment for Settlement Operating cash flows for operating leases Operating Lease, Payments Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Adjustments to net unrealized gains (losses) on available-for-sale debt investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Term Loan, SOFR Plus 0.75% Due March 2024 Term Loans, SOFR Plus 0.75% Due March 2024 [Member] Term Loans, SOFR Plus 0.75% Due March 2024 Interest cost Interest cost Defined Benefit Plan, Interest Cost Other Income and Expenses [Abstract] Other Income and Expenses [Abstract] PEO PEO [Member] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Risks and Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Auditor Location Auditor Location Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Change in plan assets: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Cash equivalents Cash Equivalents [Member] Cash and cash equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Debt Instrument [Axis] Debt Instrument [Axis] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Credit Facility [Axis] Credit Facility [Axis] Schedule of maturities of long-term debt Schedule of Maturities of Long-Term Debt [Table Text Block] Total liabilities Liabilities Liabilities Current income tax expense (benefit) Current Income Tax Expense (Benefit) Number of shares reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Payments of revolving credit facilities Repayments of Long-Term Lines of Credit Title of Individual [Axis] Title of Individual [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Audit Information [Abstract] Audit Information Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Reductions from lapse of statutes of limitations Decrease in Unrecognized Tax Benefits is Reasonably Possible China CHINA Cash equivalents, gross unrealized losses Cash Equivalents, Gross Unrealized Losses Cash Equivalents, Gross Unrealized Losses Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] State Current State and Local Tax Expense (Benefit) Total current assets Assets, Current Net periodic pension cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Equity securities Equity Securities [Member] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Aggregate fair value of plan assets Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets Equity funds Defined Benefit Plan, Equity Securities [Member] Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Japan JAPAN Concentration risk (as a percent) Concentration Risk, Percentage Schedule of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of tax credit carryforwards Summary of Tax Credit Carryforwards [Table Text Block] Non-current portion of accrued severance plan obligations Postemployment Benefits Liability, Noncurrent Awards granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Proceeds from foreign exchange forward contracts Proceeds from Derivative Instrument, Investing Activities Pension and Severance Plans Pension and Severance Plans [Text Block] The entire disclosure for pension and severance defined benefit plans. 2027 Finance Lease, Liability, to be Paid, Year Four Asset-backed securities Asset-Backed Securities [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Exercisable (in dollars) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Depreciation and amortization Depreciation, Depletion and Amortization Furniture, fixtures and other equipment Furniture, fixtures and other equipment Furniture and Fixtures [Member] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Unrecognized tax benefits, reduction of deferred tax assets Unrecognized Tax Benefits, Reduction Of Deferred Tax Assets Unrecognized Tax Benefits, Reduction Of Deferred Tax Assets Time-Vested Restricted Stock Units Time-Vested Restricted Stock Units [Member] Time-Vested Restricted Stock Units Commercial paper Commercial Paper [Member] Term Loan fixed rate at 1.85% due April 2024 Term Loan Fixed Rate At 1.85% Due April 2024 [Member] Term Loan Fixed Rate At 1.85% Due April 2024 Schedule of amounts recognized in balance sheet Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Valuation allowance Total valuation allowance Deferred Tax Assets, Valuation Allowance Performance-Vested Restricted Stock Units Performance-Vested Restricted Stock Units [Member] Performance-Vested Restricted Stock Units Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Schedule of changes in projected benefit obligations and fair value of plan assets Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Property, Plant and Equipment by Type [Axis] Long-Lived Tangible Asset [Axis] Preferred stock designated Series A, shares issued (in shares) Preferred Stock, Shares Issued Entity Emerging Growth Company Entity Emerging Growth Company Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Total deferred tax assets Deferred Tax Assets, Gross Malaysia MALAYSIA 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Actuarial Net Gain (Loss) Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Title Trading Arrangement, Individual Title Common Stock Common Stock [Member] Adjustments to unrealized components of defined benefit pension plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Individual: Individual [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Term Loan, SOFR Plus 0.75% Due June 2025 Term Loans, SOFR Plus 0.75% Due June 2025 [Member] Term Loans, SOFR Plus 0.75% Due June 2025 Reductions from lapse of statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Total equity Balance at beginning of period Balance at end of period Equity, Including Portion Attributable to Noncontrolling Interest Other, net Other Investment Type [Member] Other Investment Type [Member] Subsidiary dividends to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Minimum Minimum [Member] Shares used in computing per common share amounts: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign Currency Translation Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Projected benefit obligation at January 1 Projected benefit obligation at December 31 Defined Benefit Plan, Benefit Obligation ASSETS Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-Term Debt 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Foreign currency (gain) loss, net Gain (Loss), Foreign Currency Transaction, before Tax Schedule of fair value of derivative instruments in statement of financial position Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule II - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Other Deferred Tax Assets, Other Aggregate accumulated benefit obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation U.S. government bonds US Treasury Securities [Member] Other assets Deferred Income Tax Assets, Net Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Other investing activities Payments for (Proceeds from) Other Investing Activities Retained Earnings Retained Earnings [Member] Software and computer equipment Software and computer equipment Software and Computer Equipment [Member] Software and Computer Equipment [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Foreign exchange (gain) loss Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Total, gross unrealized losses Debt Securities, Available-For-Sale, And Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax Debt Securities, Available-For-Sale, And Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax Basic (in dollars per share) Earnings Per Share, Basic Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Fair value of plan assets at January 1 Fair value of plan assets at December 31 Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Net deferred tax assets Deferred Tax Assets, Net Total intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Income taxes Income Taxes Paid Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Amortized cost of held-to-maturity securities Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Trade accounts payable Increase (Decrease) in Accounts Payable Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Korea KOREA, REPUBLIC OF Entity Public Float Entity Public Float Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Valuation allowance reversed Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount All Trading Arrangements All Trading Arrangements [Member] Within 1 year, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Derivative assets, fair value Derivative Asset Awards forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Deferred income taxes Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total Finance Lease, Liability Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Awards forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) 2024 Long-Term Debt, Maturity, Year One Total Factored Total Factored [Member] Total Accounts Receivable Factored [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Share-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Collateralized debt Debt Instrument, Collateral Amount Proceeds from sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Income tax credits generated Effective Income Tax Rate Reconciliation, Tax Credit, Percent Document Period End Date Document Period End Date Philippines PHILIPPINES Adoption Date Trading Arrangement Adoption Date Net sales Revenue from Contract with Customer Benchmark [Member] Weighted average discount rate, Finance leases Finance Lease, Weighted Average Discount Rate, Percent Long term finance lease liabilities Finance Lease, Liability, Noncurrent Treasury Stock Treasury Stock, Common [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Foreign Portugal PORTUGAL Gain on disposal of fixed assets, net Gain (Loss) on Disposition of Property Plant Equipment Income tax expense Income tax expense Income Tax Expense (Benefit) Foreign net operating loss carryforwards Total foreign countries Non-US [Member] Fair Value Measurements Fair Value Disclosures [Text Block] Number of operating segments Number of Operating Segments Amortization and settlement gain included in net periodic pension cost Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Term loan, fixed rate at 1.30%, due July 2023 Term Loan, Fixed Rate at 1.30% Due July 2023 [Member] Term Loan, Fixed Rate at 1.30% Due July 2023 [Member] Equity [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Weighted average remaining lease term, Operating leases Operating Lease, Weighted Average Remaining Lease Term Accrued benefit liability (included in pension and severance obligations) Liability, Defined Benefit Plan Factoring of Accounts Receivable [Domain] Factoring of Accounts Receivable [Domain] [Domain] for Factoring of Accounts Receivable [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Money market funds Money Market Funds [Member] Recognized actuarial (gain) loss Defined Benefit Plan, Amortization of Gain (Loss) Foreign Tax Credits Tax Credit Carryforward, Amount Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Treasury stock acquired through surrender of shares for tax withholding (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Expected rate of return on plan assets for determining net periodic pension cost (as a percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Credit Facility [Domain] Credit Facility [Domain] Interest rate spread (as a percent) Debt Instrument, Basis Spread on Variable Rate Useful life Property, Plant and Equipment, Useful Life Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Vietnam VIET NAM Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Discount rate for determining net periodic pension cost (as a percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Schedule of valuation allowance Summary of Valuation Allowance [Table Text Block] Less: Imputed interest Finance Lease, Liability, Undiscounted Excess Amount Reductions related to settlements with tax authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Additional Paid- In Capital Additional Paid-in Capital [Member] Document Annual Report Document Annual Report Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Cover [Abstract] Cover [Abstract] Term loan, fixed rate at 2.12%, due December 2028 Term Loan Fixed Rate At 2.12% Due December 2028 [Member] Term Loan Fixed Rate At 2.12% Due December 2028 Total, amortized cost Debt Securities, Available-For-Sale, And Cash Equivalents, Amortized Cost Debt Securities, Available-For-Sale, And Cash Equivalents, Amortized Cost United States UNITED STATES Total Defined Benefit Pension Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Other non-current liabilities Other Liabilities, Noncurrent Payments for foreign exchange forward contracts Payments for Derivative Instrument, Investing Activities Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Short-term investments (amortized cost of $474,663 and $283,641, respectively) Short-Term Investments Total operating expenses Operating Expenses Amortization of leased assets Finance Lease, Right-of-Use Asset, Amortization Business Segments, Customer Concentrations and Geographic Information Segment Reporting Disclosure [Text Block] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Equity Component [Domain] Equity Component [Domain] Short-term finance lease liability Finance Lease, Liability, Current Mortgage-backed securities Mortgage-Backed Securities, Other [Member] U.S. state net operating loss carryforwards State and Local Jurisdiction [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Other Deferred Tax Liabilities, Other Number of quarterly installments Debt Instrument, Principal Payment, Number Of Quarterly Installments Debt Instrument, Principal Payment, Number Of Quarterly Installments Entity Current Reporting Status Entity Current Reporting Status Taiwan TAIWAN Concentration Risk Type [Domain] Concentration Risk Type [Domain] Operating income Operating Income (Loss) Rate of compensation increase for determining net periodic pension cost (as a percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Total deferred tax liabilities Deferred Tax Liabilities, Gross Consolidated Entities [Domain] Consolidated Entities [Domain] Singapore SINGAPORE Fair Value Estimate of Fair Value Measurement [Member] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Total, gross unrealized gains Debt Securities, Available-For-Sale, And Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax Debt Securities, Available-For-Sale, And Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax Consolidated Entities [Axis] Consolidated Entities [Axis] Variable Rate [Domain] Variable Rate [Domain] Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Pay vs Performance Disclosure [Line Items] Entity Voluntary Filers Entity Voluntary Filers Statistical Measurement [Domain] Statistical Measurement [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Nonvested beginning balance (in shares) Nonvested ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Debt Debt Disclosure [Text Block] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Deferred gain Deferred Tax Liabilities, Tax Deferred Income Research and Development Costs Research and Development Expense, Policy [Policy Text Block] Investments, Debt and Equity Securities [Abstract] Revolving Credit Facility Revolving Credit Facility [Member] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Segment Reporting [Abstract] Segment Reporting [Abstract] Trade accounts payable Accounts Payable, Current Exercisable (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Asset-backed securities, Fair Value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Restatement Determination Date: Restatement Determination Date [Axis] Term loan, fixed rate at 1.35%, due December 2024 Term Loan, Fixed Rate at 1.35% Due December 2024 [Member] Term Loan, Fixed Rate at 1.35% Due December 2024 [Member] Total other expense, net Nonoperating Income (Expense) U.S. federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Commitments and contingencies (Note 17) Commitments and Contingencies Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Debt securities Defined Benefit Plan, Debt Security [Member] Curtailment (gain) loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Term loan, fixed rate at 1.23%, due December 2026 Term Loan Fixed Rate At 1.23% Due December 2026 [Member] Term Loan Fixed Rate At 1.23% Due December 2026 Geographical [Axis] Geographical [Axis] Ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Foreign Plan Foreign Plan [Member] Income Taxes Income Tax Disclosure [Text Block] 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Total property, plant and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Leases Lessee, Leases [Policy Text Block] Geographic sources of income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest [Abstract] Preferred stock designated Series A, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Weighted- average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Revolving credit facilities and term loans (Level 2) Subsidiary Term Loans and Revolving Credit Facilities [Member] Subsidiary Term Loans and Revolving Credit Facilities [Member] PEO Total Compensation Amount PEO Total Compensation Amount Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Fully vested and expected to vest (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Schedule of allocation of plan assets Schedule of Allocation of Plan Assets [Table Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Treasury stock, shares (in shares) Balance at beginning of period, treasury stock (in shares) Balance at end of period, treasury stock (in shares) Treasury Stock, Common, Shares 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year One Outstanding beginning balance (in shares) Outstanding ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Buildings and improvements Buildings and improvements Building and Building Improvements [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Deferred interest expense Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Interest Expense Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Interest Expense Net income attributable to Amkor Net Income (Loss) Attributable to Parent Net Income (Loss) Total current liabilities Liabilities, Current Derivative Contract [Domain] Derivative Contract [Domain] Schedule of benefit obligations in excess of fair value of plan assets Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] 2025 Finance Lease, Liability, to be Paid, Year Two Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name After 1 year through 5 years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Leases Lessee, Operating Leases [Text Block] Accrued interest Interest Payable, Current Corporate bonds Corporate Bond Securities [Member] Tax benefit from income tax holiday Income Tax Holiday, Aggregate Dollar Amount Property, plant and equipment, net Total property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Foreign exchange gain (loss) Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Right of use assets acquired through finance lease liabilities Lease Obligation Incurred Short-term investments, gross unrealized losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Cost of sales Cost of Goods and Services Sold Net amount recognized at year end Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position U.S. federal net operating loss carryforwards Internal Revenue Service (IRS) [Member] Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Name Measure Name Name Forgone Recovery, Individual Name Payments for short-term investments Payments to Acquire Short-Term Investments Goodwill Goodwill Additions for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Valuation Allowance [Table] Valuation Allowance [Table] Measurement Basis [Axis] Measurement Basis [Axis] Underlying Securities Award Underlying Securities Amount Total pension expense Pension Cost (Reversal of Cost) Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Fair Value Measurement [Domain] Fair Value Measurement [Domain] Advanced Products Advanced Products [Member] Advanced Products [Member] Cash dividends declared per common share (in dollars per share) Dividends per share, declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Restricted shares vesting (as a percent) Restricted Shares Vesting Percentage The annual rate at which restricted share awards vest to employees. Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Communications (smartphones, tablets) Sales Channel, Communications [Member] Sales Channel, Communications [Member] Payments for debt issuance costs Payments of Debt Issuance Costs Government bonds Government Bonds [Member] Government Bonds Less: Unamortized discount and deferred debt costs, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Contingencies and Litigation Commitments and Contingencies, Policy [Policy Text Block] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Schedule of maturity of operating lease liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Factoring of Accounts Receivable [Axis] Factoring of Accounts Receivable [Axis] Factoring of Accounts Receivable [Axis] Foreign Exchange Forward Foreign Exchange Forward [Member] Change in projected benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Pledged Status [Axis] Pledged Status [Axis] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Product and Service [Domain] Product and Service [Domain] Payments of long-term debt Repayments of Other Long-Term Debt Other Performance Measure, Amount Other Performance Measure, Amount Schedule of components of lease expense Lease, Cost [Table Text Block] Inventories Increase (Decrease) in Inventories Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Plan Name [Domain] Plan Name [Domain] Interest expense Interest Expense Property, plant and equipment included in capital expenditures payable Capital Expenditures Incurred but Not yet Paid Loss on debt retirement Gain (Loss) on Extinguishment of Debt Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Outstanding (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Trading Arrangement: Trading Arrangement [Axis] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Use of Estimates Use of Estimates, Policy [Policy Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Schedule of restricted share activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] 2026 Long-Term Debt, Maturity, Year Three Unrealized Gain (Losses) on Available-for-Sale Debt Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Reductions for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Auditor Firm ID Auditor Firm ID Entity Shell Company Entity Shell Company Singapore dollar Singapore, Dollars Settlements and changes in uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Restatement Determination Date Restatement Determination Date Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Other non-current liabilities Increase (Decrease) in Other Operating Liabilities Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Periodic principal payment Debt Instrument, Periodic Payment, Principal Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Variable lease cost Variable Lease, Cost Operating lease cost Operating Lease, Cost Common stock, shares issued (in shares) Balance at beginning of period, common stock (in shares) Balance at end of period, common stock (in shares) Common Stock, Shares, Issued Award performance measurement period Share-Based Compensation Arrangement By Share-Based Payment Award, Award Performance Measurement Period Share-Based Compensation Arrangement By Share-Based Payment Award, Award Performance Measurement Period Awards vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Treasury stock, at cost, 46,279 and 46,158 shares, respectively Treasury Stock, Common, Value 2027 Long-Term Debt, Maturity, Year Four Balance at Beginning of Period Balance at End of Period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Weighted-average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Other financing activities Proceeds from (Payments for) Other Financing Activities Comprehensive income attributable to Amkor Comprehensive Income (Loss), Net of Tax, Attributable to Parent Benefit from income tax holiday on diluted earnings per share (in dollars per share) Income Tax Holiday, Tax Benefit, Diluted Earnings Per Share Income Tax Holiday, Tax Benefit, Diluted Earnings Per Share Schedule of expected benefit payments Schedule of Expected Benefit Payments [Table Text Block] Funded status of the Plans at December 31 Defined Benefit Plan, Funded (Unfunded) Status of Plan Operating lease liabilities Increase (Decrease) In Operating Lease Liabilities Increase (Decrease) In Operating Lease Liabilities Short-term lease cost Short-Term Lease, Cost U.S. Federal Domestic Tax Authority [Member] Entity Address, Address Line One Entity Address, Address Line One Payments remaining with the National Pension Fund Payments Remaining With Local Pension Fund Payments remaining with the Korean National Pension Fund. Aggregate fair value of plan assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets Deferred tax assets: Components of Deferred Tax Assets and Liabilities [Abstract] Prior Service Cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] Korean Severance Plan Korean Severance Plan [Member] Severance plan in the form of a lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. 2024 Finance Lease, Liability, to be Paid, Year One Weighted-Average Exercise Price per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Derivative, fair value, net Derivative, Fair Value, Net Operating loss carryforwards Operating Loss Carryforwards Accrued and unpaid interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Revenue recognition Deferred Tax Assets, Deferred Income Income Statement [Abstract] Income Statement [Abstract] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Interest income Interest Income, Deposits with Financial Institutions Derivative liabilities, fair value Derivative Liability Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Dividends declared and unpaid Dividends Payable, Current Issuance of stock through share-based compensation plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Other current assets Other Assets, Current Prepaid benefit cost (included in non-current assets) Assets for Plan Benefits, Defined Benefit Plan Cash paid during the period for: Cash Paid During Period For Abstract Cash Paid During Period For Total debt Debt, Long-Term and Short-Term, Combined Amount Current: Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Factoring of Accounts Receivable [Abstract] Factoring of Accounts Receivable [Abstract] Factoring of Accounts Receivable [Abstract] Inventories Inventory, Net Land Land [Member] Financial Instrument [Axis] Financial Instrument [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Foreign Deferred Foreign Income Tax Expense (Benefit) Japanese yen Japan, Yen Total Amkor Stockholders’ Equity Parent [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of other (income) expense Schedule of Other Nonoperating Income (Expense) [Table Text Block] Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Retained earnings Retained Earnings (Accumulated Deficit) Proceeds from sale of short-term investments Proceeds from Sale of Short-Term Investments Amount of debt agreement Debt Instrument, Face Amount Current assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Total future minimum lease payments Finance Lease, Liability, to be Paid Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Credit facility, base amount Line of Credit Facility, Maximum Borrowing Capacity Base Amount Line of Credit Facility, Maximum Borrowing Capacity Base Amount Provision of severance benefits Provision of Severance Benefits Provision related to lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. Proceeds from maturities of short-term investments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Proceeds from short-term debt Proceeds from Short-Term Debt Total finance lease cost Finance Lease, Cost Finance Lease, Cost Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Customer [Domain] Customer [Domain] Net income attributable to Amkor common stockholders, basic Net Income (Loss) Available to Common Stockholders, Basic Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Pension and severance obligations Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Income tax expense Effective Income Tax Rate Reconciliation, Percent Total Operating Lease, Liability Liability for uncertain tax positions Liability for Uncertainty in Income Taxes, Noncurrent Largest Customer Largest Customer [Member] Largest Customer Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accumulated Other Comprehensive Income (Loss) AOCI, Parent AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Additions (Credited) Charged to Expense SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Cost recognized Defined Contribution Plan, Cost All Executive Categories All Executive Categories [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Plan Name [Axis] Plan Name [Axis] Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Deferred income tax benefits for stock options and restricted stock Share-Based Payment Arrangement, Expense, Tax Benefit Net income attributable to Amkor per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Common stock, $0.001 par value, 500,000 shares authorized, 292,167 and 291,249 shares issued, and 245,888 and 245,091 shares outstanding, respectively Common Stock, Value, Issued After 1 year through 5 years, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Senior Notes Senior notes (Level 1) Senior Notes [Member] Schedule of accrued severance obligation Schedule Of Accrued Severance Obligation [Table Text Block] Schedule Of Accrued Severance Obligation [Table Text Block] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Schedule of disclosure on geographic areas, long-lived assets in individual foreign countries by country Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Payments of finance lease obligations Financing cash flows for finance leases Finance Lease, Principal Payments Schedule of maturity of finance lease liabilities Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Philippine peso Philippines, Pesos All Individuals All Individuals [Member] Other (income) expense, net Total other (income) expense, net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Operating lease liabilities Deferred Tax Assets, Operating Lease Liabilities Deferred Tax Assets, Operating Lease Liabilities Schedule of effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Fair market value of held-to-maturity securities Debt Securities, Held-to-Maturity, Fair Value Balance, beginning of period Balance, end of period Unrecognized Tax Benefits Income Tax Authority [Axis] Income Tax Authority [Axis] PEO Name PEO Name Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Preferred stock designated Series A, shares authorized (in shares) Preferred Stock, Shares Authorized 2029 to 2033 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Write-offs SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Repatriation of earnings estimated tax impact Repatriation Of Earnings Estimated Tax Impact The estimated tax impact (foreign withholding and federal income tax) that would be generated if undistributed earnings as of the balance sheet date were to be repatriated to the domestic country. Other accrued expenses Other Accrued Liabilities, Current SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Product Concentration Risk Product Concentration Risk [Member] Credit facility percentage of variable borrowings Line of Credit Facility, Percentage of Variable Borrowings Line of Credit Facility, Percentage of Variable Borrowings Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Total Amkor stockholders’ equity Equity, Attributable to Parent Foreign earnings and profits Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Restricted Stock [Member] Restricted shares Restricted Stock [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Two Thousand Twenty-One Equity Incentive Plan Member Two Thousand Twenty-One Equity Incentive Plan Member [Member] Two Thousand Twenty-One Equity Incentive Plan Member Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Other Income and Expense Other Income and Other Expense Disclosure [Text Block] Computing (data center, infrastructure, PC/laptop, storage) Sales Channel, Computing [Member] Sales Channel, Computing [Member] Schedule of amounts recognized in other comprehensive income (loss) Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] Proceeds from issuance of long-term debt Proceeds from Issuance of Other Long-Term Debt Interest rate at end of period (as a percent) Debt Instrument, Interest Rate, Effective Percentage Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Giel Rutten [Member] Giel Rutten Loss Carryforwards and other details [Abstract] Income Taxes Textuals [Abstract] Income Taxes Textuals [Abstract] Unrecognized tax benefits, period decrease Unrecognized Tax Benefits, Period Increase (Decrease) Document Fiscal Period Focus Document Fiscal Period Focus Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity 2027 Lessee, Operating Lease, Liability, to be Paid, Year Four Outstanding beginning balance (in dollars per share) Outstanding ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based compensation Share-Based Payment Arrangement, Noncash Expense Foreign Foreign Tax Authority [Member] Other Deferred Cash Compensation [Axis] Other Deferred Cash Compensation [Axis] Other Deferred Cash Compensation [Axis] Finance lease assets Finance Lease, Right-of-Use Asset, before Accumulated Amortization City Area Code City Area Code Product and Service [Axis] Product and Service [Axis] Earnings Per Share Earnings Per Share [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Geographical [Domain] Geographical [Domain] Property, plant and equipment, transferred amount Property, Plant and Equipment, Transfers and Changes Schedule of all common stock option activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Exercise Price Award Exercise Price Other Deferred Cash Compensation [Domain] Other Deferred Cash Compensation [Domain] Other Deferred Cash Compensation [Domain] Asia Pacific (excluding Japan) Asia [Member] Unrealized foreign exchange gain Deferred Tax Liabilities, Unrealized Currency Transaction Gains Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Unbilled receivables Deferred Tax Liabilities, Unbilled Receivables Deferred Tax Liabilities, Unbilled Receivables Total liabilities and equity Liabilities and Equity Short-term investments, amortized cost Debt Securities, Available-for-Sale, Amortized Cost Other assets Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Term loan, fixed rate at 1.80%, due December 2028 Term Loan, Fixed Rate At 1.80%, Due December 2028 [Member] Term loan, fixed rate at 1.80%, due December 2028 Operating lease right of use assets Operating Lease, Right-of-Use Asset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Foreign Current Foreign Tax Expense (Benefit) Currency [Axis] Currency [Axis] Discount rate for determining benefit obligations at December 31 (as a percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Finance lease, liability, current, statement of financial position Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Net income attributable to Amkor common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Arrangement Duration Trading Arrangement Duration Cash equivalent, fair value Cash Equivalent, Fair Value Disclosure Cash Equivalent, Fair Value Disclosure Other Assets Schedule of Other Assets, Noncurrent [Table Text Block] Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Asset-backed securities, Amortized Cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Other foreign countries Other Foreign Countries [Member] Other Foreign Countries [Member] Fully vested and expected to vest (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Factoring Fees Factoring Fees [Member] Factoring Fees [Member] Aggregate projected benefit obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Termination Date Trading Arrangement Termination Date Description Of Business Description Of Business [Policy Text Block] Description Of Business Common stock, shares authorized (in shares) Common Stock, Shares Authorized Short-term investments, fair value Short-term investments, fair value Debt Securities, Available-for-Sale Net income attributable to Amkor per common share: Earnings Per Share Data [Abstract] Earnings Per Share Data Short-term investments, gross unrealized gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Short-term Investments Short-Term Investments [Member] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Award vesting installments Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Installments Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Installments Award Timing Disclosures [Line Items] Title of Individual [Domain] Title of Individual [Domain] Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Total fair value of vested restricted shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Additional paid-in capital Additional Paid in Capital Amount of unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Pledged Status [Domain] Pledged Status [Domain] Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] Income Taxes Income Tax, Policy [Policy Text Block] Short-term borrowings and current portion of long-term debt Less: Short-term borrowings and current portion of long-term debt Debt, Current Municipal bonds Municipal Bonds [Member] Insider Trading Arrangements [Line Items] Operating lease right of use assets Deferred Tax Liabilities, Operating Lease, Right-of-use Asset Deferred Tax Liabilities, Operating Lease, Right-of-use Asset Outstanding ending balance (in dollars) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Issuance of stock through share-based compensation plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Foreign income taxed at different rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Consumer (AR & gaming, connected home, home electronics, wearables) Sales Channel, Consumer Goods [Member] Sales Channel, Consumer Goods[Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Noncontrolling interests in subsidiaries Equity, Attributable to Noncontrolling Interest Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Auditor Name Auditor Name Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Entity Central Index Key Entity Central Index Key Amortization of deferred debt issuance costs and premiums Amortization of Debt Issuance Costs and Discounts Net Loss on derivative Derivative, Gain (Loss) on Derivative, Net Share-based compensation Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income Tax Authority [Domain] Income Tax Authority [Domain] Payroll and benefits Employee-related Liabilities, Current Schedule of operating loss carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Name Trading Arrangement, Individual Name Net sales Net sales Revenue from Contract with Customer, Excluding Assessed Tax Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Weighted average discount rate, Operating leases Operating Lease, Weighted Average Discount Rate, Percent SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Within 1 year, Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Long-term debt Long-term debt Long-Term Debt, Excluding Current Maturities Weighted average remaining lease term, Finance leases Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Actual gain (loss) on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Accounts receivable sold Accounts Receivable Sold without Recourse Accounts Receivable Sold without Recourse Diluted (in shares) Weighted-average number of common shares outstanding — diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted 2007 Plan Two Thousand Seven Equity Incentive Plan [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Number of annual borrowings Debt Instrument, Number of Annual Borrowings, Maximum Debt Instrument, Number of Annual Borrowings, Maximum Term Loan, SOFR Plus 0.75% Due 2025 Term Loans, SOFR Plus 0.75% Due 2025 [Member] Term Loans, SOFR Plus 0.75% Due 2025 Unrealized foreign exchange loss Deferred Tax Assets, Unrealized Currency Losses Payments for property, plant and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Total assets Assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Thereafter Finance Lease, Liability, to be Paid, after Year Five Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 2028 Long-Term Debt, Maturity, Year Five Operating cash flows for finance leases Finance Lease, Interest Payment on Liability Awards vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Construction in progress Construction in Progress [Member] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Taiwan dollar Taiwan, New Dollars Severance payments Payments for Employee Severance Lump-sum payments related to termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Plan assets, target allocation (as a percent) Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Adjustment to Compensation: Adjustment to Compensation [Axis] Less current portion of accrued severance plan obligations (Note 10) Postemployment Benefits Liability, Current Debt Instrument [Line Items] Debt Instrument [Line Items] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Basic (in shares) Weighted-average number of common shares outstanding — basic (in shares) Weighted Average Number of Shares Outstanding, Basic Property, plant and equipment Deferred Tax Assets, Property, Plant and Equipment Short-term term loans, variable rate Short term term loan, variable rate [Member] Short term term loan, variable rate [Member] Property, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Basis of Presentation Basis Of Presentation [Policy Text Block] Basis Of Presentation [Policy Text Block] Total accrued severance plan obligations at December 31 Postemployment Benefits Liability Treasury notes Treasury Notes [Member] Treasury Notes Plans with underfunded or non-funded accumulated benefit obligation: Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] Proceeds from issuance of stock through share-based compensation plans Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Deferred: Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract] Factoring of Accounts Receivable [Line Items] Factoring of Accounts Receivable [Line Items] [Line Items] for Factoring of Accounts Receivable [Table] Fully vested and expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Schedule of short term borrowings and long term debt Schedule of Debt [Table Text Block] Schedule of debt securities available-for-sale Debt Securities, Available-for-Sale [Table Text Block] Proceeds from revolving credit facilities Proceeds from Long-Term Lines of Credit Cash equivalents, gross unrealized gains Cash Equivalents, Gross Unrealized Gains Cash Equivalents, Gross Unrealized Gains Factoring of Accounts Receivable Factoring of Accounts Receivable [Text Block] Factoring of Accounts Receivable Noncontrolling Interest in Subsidiaries Noncontrolling Interest [Member] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis]