Certificates of Deposit Certificates of Deposit [Member] ESPP discount rate Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Common Stocks Common Stock [Member] Patents and other assets, net Patent and Other Assets, Net Patent and Other Assets, Net Fire Protection Products Fire Protection Products [Member] Fire Protection Products [Member] Other Other Debt Obligations [Member] Range [Domain] Range [Domain] Inventory Disclosure [Abstract] Numerators: Numerators [Abstract] Numerators [Abstract] Geographical [Domain] Geographical [Domain] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Long-term investments Long-term Investments Intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Accounts payable Accounts Payable, Current Income Statement Location [Domain] Income Statement Location [Domain] Market Value Investments, Fair Value Disclosure Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Repayment of debt Repayments of Long-term Debt Current Fiscal Year End Date Current Fiscal Year End Date Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Automotive Segment Automotive Segment [Member] Automotive Segment [Member] Technology investments in non-consolidated affiliates Cost Method Investments Award Type [Domain] Equity Award [Domain] OPERATING EXPENSES: Operating Expenses [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Finished goods Inventory, Finished Goods, Gross Gain on sale of investments Gain on Sale of Investments Additional paid-in capital Additional Paid in Capital, Common Stock Prepaid expenses and other Prepaid Expense and Other Assets, Current Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Employee Stock Option Plan Employee Stock Option Plan [Member] Employee Stock Option Plan [Member] Additional borrowings available Debt Instrument, Additional Borrowings Available Face Amount Debt Instrument, Additional Borrowings Available Face Amount Equity investment losses were considered to be other than temporary Other than Temporary Impairment Losses, Investments Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Level 1 Fair Value, Inputs, Level 1 [Member] Cash & Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure DEFERRED INCOME TAXES Deferred Tax Liabilities, Net, Noncurrent Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Automotive Products Automotive Products Segment [Member] Automotive Products Segment [Member] Stock-Based Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Repurchases of common stock Payments for Repurchase of Common Stock Shares granted (in shares) Employee Stock Ownership Plan (ESOP), Number of Allocated Shares Goodwill Goodwill Cumulative-effect adjustment New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Income Statement Location [Axis] Income Statement Location [Axis] Decrease (Increase) in other assets Increase (Decrease) in Other Operating Assets Adjustments to reconcile net income to net cash provided by operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Unearned stock-based compensation Deferred Compensation Equity Long-Term Investments Other Long-term Investments [Member] PLANT AND EQUIPMENT—NET Property, Plant and Equipment, Net OTHER INCOME (LOSS) Investment Income, Nonoperating [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Net cash used for financing activities Net Cash Provided by (Used in) Financing Activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Prepaid expenses and other Increase (Decrease) in Prepaid Expense and Other Assets Investment Type [Axis] Investment Type [Axis] Stock Options Employee Stock Option [Member] ESPP discount rate recognized as compensation expense Share Based Compensation Arrangement By Share Based Payment Award Discount Recognized As Compensation Expense Share-based compensation arrangement by share-based payment award discount recognized as compensation expense. Stock repurchased and retired (in dollars per share) Treasury Stock Acquired, Average Cost Per Share COST OF GOODS SOLD Cost of Goods Sold Amortization expense, 2018 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Expected term of options Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Schedule of Amortized Cost, Unrealized Gains And Losses, And Market Value of Investment Securities Unrealized Gain (Loss) on Investments [Table Text Block] Income from operations Income from operations Operating Income (Loss) Expense for income taxes related to components of other comprehensive income Other Comprehensive Income (Loss), Tax AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Increase in quarterly dividend rate (in dollars per share) Increase In Cash Dividend Rate Increase In Cash Dividend Rate Commitments and Contingencies Disclosure [Abstract] Amortization expense Restricted Stock or Unit Expense CASH FLOWS USED FOR INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Inventories Increase (Decrease) in Inventories Payment terms Revenue from Contract with Customer, Payment Terms Revenue from Contract with Customer, Payment Terms Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Number of shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Preferred Stock Preferred Stock [Member] Equity Incentive Plans Stock Compensation Plan [Member] Retained earnings Retained Earnings (Accumulated Deficit) Debt and Financing Arrangements Debt Disclosure [Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Aggregate Fair Value, Greater than one year Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Change in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Total revenue Revenue from Contract with Customer, Including Assessed Tax Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Shares approved (in shares) Employee Stock Ownership Plan (ESOP), Shares in ESOP Aggregate Fair Value, Total Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Germany GERMANY Amortization expense, 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] LIBOR Rate London Interbank Offered Rate (LIBOR) [Member] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Due over five years Available-for-sale Securities, Debt Maturities, after Five Years, Fair Value Available-for-sale Securities, Debt Maturities, after Five Years, Fair Value Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Engineering, research and development Research and Development Expense Automotive Products Automotive Products [Member] Automotive Products [Member] Other Income (Loss), net Other Nonoperating Income (Expense) Homelink Technology Developed Technology Rights [Member] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] TOTAL LIABILITIES Liabilities Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Government Securities US Treasury Securities [Member] U.S. UNITED STATES Basic (in dollars per share) Earnings Per Share, Basic Denominator for basic EPS, weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Net decrease in period (in shares) Net Decrease in Common Stock Shares from Shares Issued in Share Based Compensation and Shares Repurchased Net Decrease in Common Stock Shares from Shares Issued in Share Based Compensation and Shares Repurchased Finite-lived intangible assets, net Finite-Lived Intangible Assets, Net Document Period End Date Document Period End Date Raw materials Inventory, Raw Materials, Gross Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Aggregate Fair Value, Less than one year Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Patents and Other Intangible Assets Patents and Other Intangible Assets [Member] Patents and Other Intangible Assets [Member] Compensation expense for share-based payments Allocated Share-based Compensation Expense Revolving Facility Revolving Credit Facility [Member] Amortization expense, 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two Other Products Other Products [Member] Other Products [Member] Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Common stock Common Stock, Value, Issued ASSETS Assets [Abstract] Restricted Stock Plan Restricted Stock Plan [Member] Restricted Stock Plan [Member] Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Organization, Consolidation and Presentation of Financial Statements [Abstract] Dividends declared Dividends Range [Axis] Range [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Purchases Payments to Acquire Available-for-sale Securities Cash and cash equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash and Cash Equivalents, at Carrying Value HomeLink Trade Names and Trademarks Trademarks and Trade Names [Member] Accounts payable Increase (Decrease) in Accounts Payable Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Business Acquisition [Axis] Business Acquisition [Axis] Accrued liabilities, excluding dividends declared and short-term debt Increase (Decrease) in Accrued Liabilities Cash Dividends Declared per Share (in dollars per share) Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Document Fiscal Year Focus Document Fiscal Year Focus Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Equity Stockholders' Equity Note Disclosure [Text Block] Total assets Assets SHAREHOLDERS’ INVESTMENT Stockholders' Equity Attributable to Parent [Abstract] Term Loan and Revolving Facility Term Loan and Revolving Facility [Member] Term Loan and Revolving Facility [Member] Total Available-for-sale Securities, Debt Securities Total net reclassifications for the period Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Dimmable Aircraft Windows Dimmable Aircraft Windows [Member] Dimmable Aircraft Windows [Member] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Investments Fair Value Disclosures [Text Block] Schedule of Automotive and Other Segment Reporting Schedule of Segment Reporting Information, by Segment [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Deferred income taxes Deferred Income Tax Expense (Benefit) Document Type Document Type Total other assets Other Assets, Noncurrent Employee Stock Ownership Plan (ESOP) Disclosures, by Plan [Axis] Employee Stock Ownership Plan (ESOP) Name [Axis] Segments [Domain] Segments [Domain] Net cash provided by (used for) investing activities Net Cash Provided by (Used in) Investing Activities Income Statement [Abstract] Other comprehensive income (loss) before tax: Other Comprehensive Income (Loss), before Tax [Abstract] Diluted (in dollars per share) Earnings Per Share, Diluted Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Denominators: Denominators [Abstract] Denominators [Abstract] Amortization expense Amortization of Intangible Assets PROVISION FOR INCOME TAXES Provision for income taxes Income Tax Expense (Benefit) Segment Reporting Segment Reporting Disclosure [Text Block] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Inventories Total Inventory Inventory, Net Total current assets Assets, Current NET INCREASE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Financial Position [Abstract] Amortization expense, 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four Corporate Bonds Corporate Bond Securities [Member] Total current liabilities Liabilities, Current OTHER ASSETS Assets, Noncurrent [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Aggregate Unrealized Losses, Less than one year Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Compensation cost capitalized as part of inventory Share-based Goods and Nonemployee Services Transaction, Capitalized Cost Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Earnings Per Share Basic And Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Activity in available-for-sale securities: Payments to Acquire Available-for-sale Securities [Abstract] Principal amount Debt Instrument, Face Amount Short-term investments Short-term Investments Total liabilities and shareholders’ investment Liabilities and Equity Sales proceeds Proceeds from Sale of Available-for-sale Securities Exclusive Licensing Agreement Licensing Agreements [Member] Accounts receivable, net Accounts Receivable, Net, Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Credit Agreement Line of Credit [Member] Debt Disclosure [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Segments [Axis] Segments [Axis] Equity Components [Axis] Equity Components [Axis] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Variable Rate [Axis] Variable Rate [Axis] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Weighted-Average Assumptions For The Employee Stock Option Plan Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Award Type [Axis] Award Type [Axis] Intangible Assets, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Issuance of common stock from stock plan transactions Proceeds from Issuance of Common Stock Adoption of new Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Denominator for diluted EPS (in shares) Weighted Average Number of Shares Outstanding, Diluted Partial repayment of debt Extinguishment of Debt, Amount Non Employee Director Stock Option Plan Non Employee Director Stock Option Plan [Member] Non-Employee Director Stock Option Plan [Member] Other Segment Other Segment [Member] Other Segment [Member] Adoption of New Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Swing Loans Swing Loans [Member] Swing Loans [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] CASH FLOWS USED FOR FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Short-Term Investments Short-term Investments [Member] Schedule of Unrealized Loss on Investments Schedule of Unrealized Loss on Investments [Table Text Block] Total operating expenses Operating Expenses Japan JAPAN Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Payments of financing costs Payments of Financing Costs Plant and equipment additions Payments to Acquire Productive Assets Current portion of long-term debt Long-term Debt, Current Maturities Weighted-avg. grant-date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Letter of Credit Letter of Credit [Member] Option expiration period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Unrealized gains (losses) on derivatives Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Stock-based compensation expense related to employee stock options, employee stock purchases and restricted stock Share-based Compensation Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Windows Products Windows Products [Member] Windows Products [Member] Other Other Countries [Member] Other Countries [Member] Investments [Abstract] NET INCOME Net Income Numerator for both basic and diluted EPS, net income Net Income (Loss) Attributable to Parent Potentially dilutive shares resulting from stock plans (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Finite-lived intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Income before provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Geographical [Axis] Geographical [Axis] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Accounts receivable, net Increase (Decrease) in Accounts Receivable Accumulated other comprehensive income (loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] Other Other Segments [Member] Investments and Cash Investments and Cash Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Contingencies Commitments and Contingencies Disclosure [Text Block] Unrealized gains (losses) on debt securities, net Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Entity Filer Category Entity Filer Category Maturities and calls Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Equity [Abstract] Employee Stock Ownership Plan (ESOP), Plan [Domain] Employee Stock Ownership Plan (ESOP), Plan [Domain] Unrealized gains (losses) on available-for-sale debt securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Amortization expense, 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three Schedule of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Proceeds from sale of plant and equipment Proceeds from Sale of Property, Plant, and Equipment Loss on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Accrued liabilities Accrued Liabilities, Current Existing Customer Platforms Customer Contracts [Member] Automotive Mirrors & Electronics Automotive Mirrors & Electronics [Member] Automotive Mirrors & Electronics [Member] Term Loan Term Loan [Member] Term Loan [Member] HomeLink® HomeLink® [Member] HomeLink® [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Income Tax Disclosure [Abstract] Long-term debt Long-term Debt Gentex Patents Patents [Member] Other Comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Option vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period NET SALES Revenue Sales Revenue, Goods, Net Products and Services [Axis] Products and Services [Axis] Reclassification Out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Depreciation and amortization Depreciation, Depletion and Amortization Due between one and five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Annual principal repayments Debt Instrument, Annual Principal Payment Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Other, Net Other, Net [Member] Other, Net [Member] Entity Registrant Name Entity Registrant Name Cost Available-for-sale Securities, Amortized Cost Basis Mutual Funds Mutual Fund [Member] Total Other Income Nonoperating Income (Expense) Investment [Table] Investment [Table] CURRENT LIABILITIES Liabilities, Current [Abstract] Investment Securities Stated at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Amendment Flag Amendment Flag Selling, general & administrative Selling, General and Administrative Expense Investment income Investment Income, Nonoperating LIABILITIES AND SHAREHOLDERS’ INVESTMENT Liabilities and Equity [Abstract] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Realized gain (loss) on sale of securities and interest rate swap Gain (Loss) on Investments, Excluding Other than Temporary Impairments Reclassifications out of other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Restricted period, maximum, in years Share-Based Compensation, Restricted Period Share-based compensation, restricted period. Income Taxes Income Tax Disclosure [Text Block] Entity Central Index Key Entity Central Index Key Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Segment Reporting [Abstract] Unrealized gains on derivatives Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Accumulated other comprehensive income (loss), end of period AOCI Attributable to Parent [Member] Aggregate Unrealized Losses, Total Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Statement of Cash Flows [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Other comprehensive income, before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Gain on disposal of assets Gain (Loss) on Disposition of Other Assets Loss on sale of investments Gain (Loss) on Sale of Investments Fixed Income Securities Fixed Income Securities [Member] Accounting Standards Update 2016-01 Accounting Standards Update 2016-01 [Member] EARNINGS PER SHARE: Earnings Per Share [Abstract] Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Products and Services [Domain] Products and Services [Domain] Minimum Minimum [Member] Type of Adoption [Domain] Type of Adoption [Domain] HomeLink Modules HomeLink Modules [Member] HomeLink Modules [Member] Stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Comprehensive Income Comprehensive Income (Loss) Note [Text Block] CURRENT ASSETS Assets, Current [Abstract] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Common stock issued under stock compensation plan (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Inventories Inventory Disclosure [Text Block] Aggregate Unrealized Losses, Greater than one year Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Variable Rate [Domain] Variable Rate [Domain] Amounts reclassified from accumulated other comprehensive income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Work-in-process Inventory, Work in Process, Gross Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Technology investments in non-consolidated affiliates (less than) Cost Method Investment, Ownership Percentage Cost Method Investment, Ownership Percentage Statement of Comprehensive Income [Abstract] Gross profit Gross Profit Total shareholders’ investment Balance at beginning of period Balance at end of period Stockholders' Equity Attributable to Parent Cash dividends paid Payments of Ordinary Dividends, Common Stock Schedule of Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Earnings Per Share Earnings Per Share [Text Block] Finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Revenue Revenue from Contract with Customer [Text Block] Document And Entity Information [Abstract] Document and Entity Information [Abstract] Investments [Domain] Investments [Domain] Stock repurchased (in shares) Stock Repurchased During Period, Shares Equity Component [Domain] Equity Component [Domain] Amounts Reclassified from Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Maximum Maximum [Member] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain]