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developed technology to exploit the technology for a period of time specified by law. QSC, LLC QSC, LLC [Member] QSC, LLC Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accounts payable Increase (Decrease) in Accounts Payable Other current liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Description of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Share-based payment expense Share-Based Payment Arrangement, Noncash Expense OEM and other Sales Channel, Through Original Equipment Manufacturer And Other [Member] Sales Channel, Through Original Equipment Manufacturer And Other [Member] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings per share (in dollars per share) Earnings Per Share, Basic Current deferred revenues Contract with Customer, Liability, Current Repurchases of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Standard warranty term (in years) Standard Product Warranty Period Standard Product Warranty Period Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, less reserve for doubtful accounts of $7.0 and $4.3, respectively Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Outstanding Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Foreign currency translation adjustments Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Debt instrument, covenant, leverage ratio, temporary maximum Debt Instrument, Covenant, Leverage Ratio, Temporary Maximum Debt Instrument, Covenant, Leverage Ratio, Temporary Maximum Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and stockholders’ equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Special charges Restructuring Charges Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Miscellaneous expense, net Miscellaneous expense, net Miscellaneous expense, net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Property, Plant and Equipment Property, Plant and Equipment [Member] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Term Loan Facility Term Loan Facility [Member] Term Loan Facility Preferred stock, $0.01 par value per share; 50.0 shares authorized; none issued Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid during the period Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Corporate accounts Sales Channel, Through Corporate Accounts Network [Member] Sales Channel, Through Corporate Accounts Network [Member] Credit Facility [Axis] Credit Facility [Axis] Freight costs Freight Costs, Current Freight Costs, Current Special Charges Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Assets in fair value hierarchy Assets, Fair Value Disclosure Name Measure Name Administrative cost Defined Contribution Plan, Administrative Expense Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Plan Asset Measurement [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Cash consideration Business Combination, Consideration Transferred Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Interest expense (income), net: Interest Income (Expense), Operating and Nonoperating [Abstract] Name Trading Arrangement, Individual Name Senior Unsecured Notes Payable Senior Unsecured Notes Payable [Member] Senior Unsecured Notes Payable Total assets at fair value Asset Fair Value Disclosure, Including Equity Securities Without Readily Determinable Fair Value, Amount Asset Fair Value Disclosure, Including Equity Securities Without Readily Determinable Fair Value, Amount Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Inventories excluding reserves Inventory, Gross Retail sales Sales Channel, Through Retail [Member] Sales Channel, Through Retail [Member] Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] AIS Acuity Intelligent Spaces Segment [Member] Acuity Intelligent Spaces Segment Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Current assets: Assets, Current [Abstract] Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Foreign currency transaction losses Gain (Loss), Foreign Currency Transaction, before Tax Other Expense Other Income and Other Expense Disclosure [Text Block] Other items Other Nonoperating Income Cost of products sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Deferred tax liabilities Business Combination, Recognized Liability Assumed, Deferred Tax Liability New Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in Components of Accumulated Other Comprehensive (Loss) Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Interest income Investment Income, Interest Liabilities assumed: Business Combination, Recognized Liability Assumed, Liability [Abstract] Recognized actuarial loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Schedule of Contract Balances Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Schedule of Estimated Useful Lives of Identifiable Intangible Assets Business Combination, Intangible Asset, Acquired, Indefinite-Lived [Table Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]