Leases [Abstract]
Undiscounted Future Lease Payments
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Components of Lease Cost
Lease, Cost [Table Text Block]
Equity [Abstract]
Schedule of Changes in Stockholders' Equity
Schedule of Stockholders Equity [Table Text Block]
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
ASC 606
Accounting Standards Update 2014-09 [Member]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock Outstanding
Common Stock [Member]
Paid-in Capital
Additional Paid-in Capital [Member]
Retained Earnings
Retained Earnings [Member]
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent [Member]
Treasury Stock, at cost
Treasury Stock [Member]
Class of Stock [Line Items]
Class of Stock [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance
Stockholders' Equity Attributable to Parent
Beginning balance (shares)
Shares, Issued
Net income
Net Income (Loss) Attributable to Parent
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
ASC 606 adjustments
Cumulative Effect of New Accounting Principle in Period of Adoption
Share-based payment amortization, issuances, and cancellations
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures
Share-based payment amortization, issuances, and cancellations (shares)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures
Employee stock purchase plan issuances
Stock Issued During Period, Value, Employee Stock Purchase Plan
Cash dividends of $0.13 per share paid on common stock
Dividends
Stock options exercised
Stock Issued During Period, Value, Stock Options Exercised
Repurchases of common stock
Stock Repurchased During Period, Value
Repurchases of common stock (shares)
Stock Repurchased During Period, Shares
Ending balance
Ending balance (shares)
Cash dividends paid (usd per share)
Common Stock, Dividends, Per Share, Cash Paid
Share-based Payment Arrangement [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Vesting [Axis]
Vesting [Axis]
Vesting [Domain]
Vesting [Domain]
Three-year vesting performance shares approved in beginning of fiscal 2020
Share-based Payment Arrangement, Tranche One [Member]
Two-year vesting performance shares granted in second quarter of 2020
Share-based Payment Arrangement, Tranche Two [Member]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Amended and Restated Acuity Brand, Inc. 2012 Omnibus Stock Compensation Incentive Plan
Amended and Restated Acuity Brand, Inc. 2012 Omnibus Stock Compensation Incentive Plan [Member]
Amended and Restated Acuity Brand, Inc. 2012 Omnibus Stock Compensation Incentive Plan [Member]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
Performance stock awards
Performance Shares [Member]
Restricted Stock and Performance Share Awards
Restricted Stock and Performance Share Awards [Member]
Restricted Stock and Performance Share Awards [Member]
Service Options
Service Stock Options [Member]
Service Stock Options [Member]
Market Options
Market Stock Options [Member]
Market Stock Options [Member]
Stock options
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Performance share units outstanding (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Minimum age for eligibility under retirement vesting provision
Share-based Compensation Arrangement by Share-based Payment Award, Retirement Vesting Provision, Award Requisite Age
Share-based Compensation Arrangement by Share-based Payment Award, Retirement Vesting Provision, Award Requisite Age
Minimum service period under retirement vesting provision
Share-based Compensation Arrangement by Share-based Payment Award, Retirement Vesting Provision, Service Period
Share-based Compensation Arrangement by Share-based Payment Award, Retirement Vesting Provision, Service Period
Options outstanding (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Options granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Award expiration period
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
Duration of trailing average stock price
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Trailing Average Stock Price, Duration
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Trailing Average Stock Price, Duration
Shares issued from options exercised in period (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Intrinsic value of options outstanding
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Intrinsic value of options expected to vest
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Intrinsic value of options exercisable
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Unrecognized compensation cost
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Recognition period for unrecognized compensation cost
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Earnings Per Share [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Restricted stock awards
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options and restricted stock awards excluded from diluted earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Accounting Policies [Abstract]
Basis of Accounting
Basis of Accounting, Policy [Policy Text Block]
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Reclassifications
Reclassification, Policy [Policy Text Block]
New Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Fair Value Measurement
Fair Value Measurement, Policy [Policy Text Block]
Fair Value Transfers
Fair Value Transfer, Policy [Policy Text Block]
Revenue Recognition
Revenue from Contract with Customer [Policy Text Block]
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension Plan
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Amortization of prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Settlement loss
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Recognized actuarial loss
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Net periodic pension cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Debt Disclosure [Abstract]
Debt and Lines of Credit
Debt Disclosure [Text Block]
Statement of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss, Current
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Stockholders’ equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized (shares)
Preferred Stock, Shares Authorized
Preferred stock, shares issued (shares)
Preferred Stock, Shares Issued
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Common stock, shares issued (shares)
Common Stock, Shares, Issued
Treasury stock, shares (shares)
Treasury Stock, Shares
Basic weighted average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Common stock equivalents (in shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
Diluted weighted average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Basic earnings per share (in dollars per share)
Income (Loss) from Continuing Operations, Per Basic Share
Diluted earnings per share (in dollars per share)
Income (Loss) from Continuing Operations, Per Diluted Share
2020
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year
2021
Lessee, Operating Lease, Liability, Payments, Due Year Two
2022
Lessee, Operating Lease, Liability, Payments, Due Year Three
2023
Lessee, Operating Lease, Liability, Payments, Due Year Four
2024
Lessee, Operating Lease, Liability, Payments, Due Year Five
Thereafter
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Total undiscounted lease payments
Lessee, Operating Lease, Liability, Payments, Due
Less: Discount due to interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Present value of lease liabilities
Operating Lease, Liability
Share-based Payments
Share-based Payment Arrangement [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Goodwill, Beginning Balance
Goodwill
Provisional additions from acquired businesses
Goodwill, Acquired During Period
Adjustments to provisional amounts from acquired businesses
Goodwill, Purchase Accounting Adjustments
Foreign currency translation adjustments
Goodwill, Foreign Currency Translation Gain (Loss)
Goodwill, Ending Balance
Commitments and Contingencies Disclosure [Abstract]
Standard warranty term
Standard Product Warranty Period
Standard Product Warranty Period
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance
Standard Product Warranty Accrual
Warranty and recall costs
Standard Product Warranty Accrual, Increase for Warranties Issued
Payments and other deductions
Standard Product Warranty Accrual, Decrease for Payments
Acquired warranty and recall liabilities
Standard Product Warranty Accrual, Additions from Business Acquisition
ASC 606 adjustments
Standard Product Warranty Accrual, Increase (Decrease) for New Accounting Pronouncements
Standard Product Warranty Accrual, Increase (Decrease) for New Accounting Pronouncements
Ending balance
Loss Contingencies [Table]
Loss Contingencies [Table]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
Lighting Science Group Patent Litigation
Lighting Science Group Patent Litigation [Member]
Lighting Science Group Patent Litigation [Member]
Securities Class Action
Securities Class Action [Member]
Securities Class Action [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Number of patents allegedly to have been infringed
Loss Contingency, Patents Allegedly Infringed, Number
Number of allegations dropped
Loss Contingency, Patents Found Not Infringed, Number
Number of former executives alleged to be in violation
Loss Contingency, Number of Defendants
Number of statements used as basis for dismissing claims
Loss Contingency, Claims Dismissed, Number
Total number of statements challenged in the Consolidated Complaint
Loss Contingency, New Claims Filed, Number
Number of challenged statements allowed to proceed to discovery
Loss Contingency, Pending Claims, Number
Inventory Disclosure [Abstract]
Inventories
Inventory Disclosure [Text Block]
Property, Plant and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve by Type of Cost
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Operating leases weighted average discount rate (percent)
Operating Lease, Weighted Average Discount Rate, Percent
Weighted average remaining lease term
Operating Lease, Weighted Average Remaining Lease Term
Rent expense
Operating Leases, Rent Expense
Operating lease payments
Operating Lease, Payments
Right-of-Use asset obtained in exchange for operating lease liability
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Severance and employee-related costs
Employee Severance [Member]
Other restructuring costs
Other Restructuring [Member]
Restructuring Plan [Axis]
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Restructuring Plan [Domain]
Fiscal 2020 Actions
Fiscal 2020 Actions Restructuring Activity [Member]
Fiscal 2020 Actions Restructuring Activity [Member]
Fiscal 2019 Actions
Fiscal 2019 Actions Restructuring Activity [Member]
Fiscal 2019 Actions Restructuring Activity [Member]
Fiscal 2018 Actions
Fiscal 2018 Actions Restructuring Activity [Member]
Fiscal 2018 Actions Restructuring Activity [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Special charges
Restructuring Charges
Restructuring Reserve [Roll Forward]
Balance, beginning of period
Restructuring Reserve
Severance costs
Restructuring and Related Cost, Incurred Cost
Payments made during the period
Payments for Restructuring
Balance, end of period
Changes in Stockholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Revenue from Contract with Customer [Abstract]
Revenue Recognition
Revenue from Contract with Customer [Text Block]
Inventory, Net [Abstract]
Raw materials, supplies, and work in process
Inventory, Work in Process and Raw Materials
Finished goods
Inventory, Finished Goods, Gross
Inventories excluding reserves
Inventory, Gross
Less: Reserves
Inventory Valuation Reserves
Total inventories
Inventory, Net
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Foreign Currency Items
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Defined Benefit Pension Plans
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive (loss) income before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Amounts reclassified from accumulated other comprehensive loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Net current period other comprehensive (loss) income
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Contract with Customer, Sales Channel [Axis]
Contract with Customer, Sales Channel [Axis]
Contract with Customer, Sales Channel [Domain]
Contract with Customer, Sales Channel [Domain]
Independent sales network
Sales Channel, Through Independent Sales Network [Member]
Sales Channel, Through Independent Sales Network [Member]
Direct sales network
Sales Channel, Through Direct Sales Network [Member]
Sales Channel, Through Direct Sales Network [Member]
Retail sales
Sales Channel, Through Retail [Member]
Sales Channel, Through Retail [Member]
Corporate accounts
Sales Channel, Through Corporate Accounts Network [Member]
Sales Channel, Through Corporate Accounts Network [Member]
Other
Sales Channel, Through Other [Member]
Sales Channel, Through Other [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Total sales
Revenue from Contract with Customer, Excluding Assessed Tax
Components of Interest Expense, Net
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Share-based payment expense
Share-based Payment Arrangement, Expense
New Accounting Pronouncement, Early Adoption [Table]
New Accounting Pronouncement, Early Adoption [Table]
ASC 842
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
New Accounting Pronouncement, Early Adoption [Line Items]
Long-term operating lease liabilities
Operating Lease, Liability, Noncurrent
Current operating lease liabilities
Operating Lease, Liability, Current
Net deferred rent derecognized
Deferred Rent Credit
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Dividend yield (percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected volatility (percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Risk-free interest rate (percent)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Expected life of options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Weighted-average fair value of options (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Business Combinations [Abstract]
Acquisitions
Business Combination Disclosure [Text Block]
Current deferred revenues
Contract with Customer, Liability, Current
Non-current deferred revenues
Contract with Customer, Liability, Noncurrent
Schedule of Inventory
Schedule of Inventory, Current [Table Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash flows from operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Share-based payment expense
Share-based Payment Arrangement, Noncash Expense
Loss on sale or disposal of property, plant, and equipment
Gain (Loss) on Disposition of Property Plant Equipment
Deferred income taxes
Deferred Income Taxes and Tax Credits
Change in assets and liabilities, net of effect of acquisitions, divestitures, and exchange rate changes:
Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Prepayments and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accounts payable
Increase (Decrease) in Accounts Payable
Other current liabilities
Increase (Decrease) in Other Accrued Liabilities
Other
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of property, plant, and equipment
Payments to Acquire Property, Plant, and Equipment
Proceeds from sale of property, plant, and equipment
Proceeds from Sale of Property, Plant, and Equipment
Acquisition of businesses, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Other investing activities
Payments for (Proceeds from) Other Investing Activities
Net cash used for investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings on credit facility
Proceeds from Lines of Credit
Repayments of borrowings on credit facility
Repayments of Lines of Credit
Repayments of long-term debt
Repayments of Long-term Debt
Repurchases of common stock
Payments for Repurchase of Common Stock
Proceeds from stock option exercises and other
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised
Payments of taxes withheld on net settlement of equity awards
Payment, Tax Withholding, Share-based Payment Arrangement
Dividends paid
Payments of Ordinary Dividends, Common Stock
Net cash provided by (used for) financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Net change in cash and cash equivalents
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Cash and cash equivalents at beginning of period
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and cash equivalents at end of period
Supplemental cash flow information:
Supplemental Cash Flow Information [Abstract]
Income taxes paid during the period
Income Taxes Paid
Interest paid during the period
Interest Paid, Excluding Capitalized Interest, Operating Activities
Foreign currency translation adjustments
Actuarial losses
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Prior service cost
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Settlement Losses
Accumulated Defined Benefit Plans Adjustment, Settlement Attributable to Parent [Member]
Accumulated Defined Benefit Plans Adjustment, Settlement Attributable to Parent [Member]
Total defined benefit pension plans, net
Actuarial gain or loss, before amortization of defined benefit pensions items, before tax
OCI, before Reclassifications, before Tax, Attributable to Parent
Actuarial gain or loss, before amortization of defined benefit pensions items, tax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Actuarial gain or loss, before amortization of defined benefit pensions items, after tax
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Amortization of defined benefit pension items, before tax
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Amortization of defined benefit pension items, tax
Reclassification from AOCI, Current Period, Tax
Amortization of defined benefit pension items, after tax
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Other comprehensive (loss) income, before tax
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent
Other comprehensive (loss) income, tax
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Other comprehensive (loss) income items, net of tax
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Components of share-based payment expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of weighted average assumptions used to estimate fair value of options
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Stock option activity
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Range of option exercise prices
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Changes in each component of accumulated other comprehensive loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of tax expense or benefit allocated to each component of other comprehensive income (loss)
Comprehensive Income (Loss) [Table Text Block]
Fair Value Disclosures [Abstract]
Schedule of Carrying Value and Estimated Fair Value of Financial Instruments
Fair Value, by Balance Sheet Grouping [Table Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
The Luminaires Group (TLG)
The Luminaires Group (TLG) [Member]
The Luminaires Group (TLG) [Member]
Fiscal 2020 Acquisitions
Fiscal 2020 Acquisitions [Member]
Fiscal 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Number of niche lighting brands
Business Combination, Acquired Entity, Number of Lighting Brands
Business Combination, Acquired Entity, Number of Lighting Brands
Goodwill
Identified intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Weighted average useful life of acquired intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Schedule of Net Periodic Pension Cost
Schedule of Net Benefit Costs [Table Text Block]
Special Charges
Restructuring and Related Activities Disclosure [Text Block]
Amount of transaction price from contracts with customers allocated to the Company's contract liabilities
Contract with Customer, Asset and Liability [Table Text Block]
Revenue from contracts with customers by sales channel
Disaggregation of Revenue [Table Text Block]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]
Fair Value, Recurring and Nonrecurring [Table]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Carrying Value
Reported Value Measurement [Member]
Fair Value
Estimate of Fair Value Measurement [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 2
Fair Value, Inputs, Level 2 [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Senior unsecured public notes, net of unamortized discount and deferred costs
Senior Notes [Member]
Unsecured Delayed Draw Term Loan
Unsecured Delayed Draw Term Loan [Member]
Unsecured Delayed Draw Term Loan [Member]
Industrial revenue bond
Nontaxable Municipal Bonds [Member]
Bank loans
Bank Loan Obligations [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Industrial Revenue Bond Maturing in 2021
Industrial Revenue Bond Maturing in 2021 [Member]
Industrial Revenue Bond [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 and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Liabilities:
Liabilities, Fair Value Disclosure [Abstract]
Carrying and estimated fair values of financial instruments
Long-term Debt, Fair Value
Number of reportable segments
Number of Reportable Segments
Fair Value Measurements
Fair Value Disclosures [Text Block]
Accounts receivable, less reserve for doubtful accounts of $1.4 and $1.0, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Inventories
Prepayments and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property, plant, and equipment, net
Property, Plant and Equipment, Net
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Deferred income taxes
Deferred Income Tax Assets, Net
Other long-term assets
Other Assets, Noncurrent
Total assets
Assets
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Current maturities of debt
Long-term Debt, Current Maturities
Accrued compensation
Employee-related Liabilities, Current
Other accrued liabilities
Other Accrued Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term debt
Long-term Debt, Excluding Current Maturities
Accrued pension liabilities
Liability, Defined Benefit Plan, Noncurrent
Deferred income taxes
Deferred Income Tax Liabilities, Net
Self-insurance reserves
Self Insurance Reserve, Noncurrent
Other long-term liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies
Commitments and Contingencies
Preferred stock, $0.01 par value; 50,000,000 shares authorized; none issued
Preferred Stock, Value, Issued
Common stock, $0.01 par value; 500,000,000 shares authorized; 53,859,675 and 53,778,155 issued, respectively
Common Stock, Value, Issued
Paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Treasury stock, at cost — 14,325,197 and 14,325,197 shares, respectively
Treasury Stock, Value
Total stockholders’ equity
Total liabilities and stockholders’ equity
Liabilities and Equity
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Earnings per Share
Earnings Per Share [Text Block]
Timing of revenue recognition
Revenue, Performance Obligation, Description of Timing
Revenue recognized from beginning balances of contract liabilities
Contract with Customer, Liability, Revenue Recognized
Operating lease cost
Operating Lease, Cost
Variable lease cost
Variable Lease, Cost
Short-term lease cost
Short-term Lease, Cost
Total lease cost
Lease, Cost
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Cover [Abstract]
Document Type
Document Type
Document Quarterly Report
Document Quarterly Report
Document Period End Date
Document Period End Date
Document Transition Report
Document Transition Report
Entity File Number
Entity File Number
Entity Registrant Name
Entity Registrant Name
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Entity Address, City or Town
Entity Address, City or Town
Entity Address, State or Province
Entity Address, State or Province
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Title of 12(b) Security
Title of 12(b) Security
Trading Symbol
Trading Symbol
Security Exchange Name
Security Exchange Name
Entity Current Reporting Status
Entity Current Reporting Status
Entity Interactive Data Current
Entity Interactive Data Current
Entity Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Shell Company
Entity Shell Company
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Central Index Key
Entity Central Index Key
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Significant Accounting Policies
Significant Accounting Policies [Text Block]
Exercise Price Range [Axis]
Exercise Price Range [Axis]
Exercise Price Range [Domain]
Exercise Price Range [Domain]
$40.01 - $100.00 (average life - 2.6 years)
Exercise Price Range One [Member]
Exercise Price Range One [Member]
$100.01 - $160.00 (average life - 8.8 years)
Exercise Price Range Two [Member]
Exercise Price Range Two [Member]
$160.01 - $210.00 (average life - 5.7 years)
Exercise Price Range Three [Member]
Exercise Price Range Three [Member]
$210.01 - $239.76 (average life - 6.7 years)
Exercise Price Range Four [Member]
Exercise Price Range Four [Member]
Number of Shares (in millions)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period (shares)
Granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures
Exercised (shares)
Canceled (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Outstanding at end of period (shares)
Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Granted (in usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Exercised (in usd per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Canceled (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Outstanding at end of period (in usd per share)
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]
Number of exercisable shares (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Weighted average exercise price of exercisable shares (in usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Share-based Payment Arrangement, Option, Exercise Price Range, Beginning of Period [Abstract]
Share-based Payment Arrangement, Option, Exercise Price Range, Beginning of Period [Abstract]
Lower range of option exercise prices (in usd per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit
Upper range of option exercise prices (in usd per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit
Average life
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Remaining Contractual Term
Number of shares outstanding (shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding
Weighted average exercise price (in usd per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price
Number of exercisable shares (shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable
Weighted average exercise price of exercisable shares (in usd per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price
Pension Plans
Pension and Other Postretirement Benefits Disclosure [Text Block]
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Land
Land [Member]
Buildings and leasehold improvements
Building and Building Improvements [Member]
Machinery and equipment
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, at cost
Property, Plant and Equipment, Gross
Less: Accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant, and equipment, net
Income Statement [Abstract]
Net sales
Cost of products sold
Cost of Goods and Services Sold
Gross profit
Gross Profit
Selling, distribution, and administrative expenses
Selling, General and Administrative Expense
Operating profit
Operating Income (Loss)
Other expense:
Nonoperating Income (Expense) [Abstract]
Interest expense, net
Interest Revenue (Expense), Net
Miscellaneous expense, net
Other Nonoperating Income (Expense)
Total other expense
Nonoperating Income (Expense)
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax expense
Income Tax Expense (Benefit)
Net income
Earnings per share:
Basic weighted average number of shares outstanding (in shares)
Diluted weighted average number of shares outstanding (in shares)
Dividends declared per share (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Comprehensive income:
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other comprehensive income (loss) items:
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent
Defined benefit plans, net of tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Product Warranty Liability
Schedule of Product Warranty Liability [Table Text Block]
Comprehensive Income
Comprehensive Income (Loss) Note [Text Block]
Amortization of intangible assets
Amortization of Intangible Assets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense in fiscal 2020
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
Amortization expense in fiscal 2021
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Amortization expense in fiscal 2022
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Amortization expense in fiscal 2023
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Amortization expense in fiscal 2024
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Leases
Lessee, Operating Leases [Text Block]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period [Domain]
Year one
Debt Instrument, Redemption, Period One [Member]
Year two
Debt Instrument, Redemption, Period Two [Member]
Year three
Debt Instrument, Redemption, Period Three [Member]
Year four
Debt Instrument, Redemption, Period Four [Member]
Year five and after
Debt Instrument, Redemption, Period Five [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Eurocurrency Rate
Eurocurrency Rate [Member]
Eurocurrency Rate [Member]
Base rate
Base Rate [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Lines of Credit
Line of Credit [Member]
Unsecured term loan
Unsecured Debt [Member]
Senior unsecured public notes
Letters of Credit
Letter of Credit [Member]
New Revolving Credit Facility
New Revolving Credit Facility [Member]
New Revolving Credit Facility [Member]
Senior Unsecured Notes Maturing December 2019
Senior Unsecured Notes Maturing December 2019 [Member]
Senior Unsecured Notes Maturing December 2019 [Member]
2016 Fixed-rate Bank Loans
2016 Fixed-rate Bank Loans [Member]
2016 Fixed-rate Bank Loans [Member]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Line of Credit Facility [Abstract]
Executed revolving credit facility
Line of Credit Facility, Maximum Borrowing Capacity
Revolving credit facility term
Debt Instrument, Term
Term loan facility
Debt Instrument, Face Amount
Borrowings outstanding under current Revolving Credit Facility
Long-term Line of Credit
Borrowings outstanding under Term Loan Facility
Long-term Debt
Borrowings reflected within Long-term debt on Consolidated Balance Sheets
Applicable margins based on company's leverage ratio, percentage
Debt Instrument, Basis Spread on Variable Rate
Number of separate installments allowed during borrowing period
Debt Instrument, Borrowing Period, Number of Installments
Debt Instrument, Borrowing Period, Number of Installments
Quarterly payment (percent)
Debt Instrument, Periodic Payment, Maturity, Percent of Principal
Debt Instrument, Periodic Payment, Maturity, Percent of Principal
Facility fee (percent)
Line of Credit Facility, Commitment Fee Percentage
Minimum interest coverage ratio
Line of Credit Facility, Covenant Terms, Interest Coverage Ratio, Minimum
Line of Credit Facility, Covenant Terms, Interest Coverage Ratio, Minimum
Maximum leverage ratio
Line of Credit Facility, Covenant Terms, Leverage Ratio, Maximum
Line of Credit Facility, Covenant Terms, Leverage Ratio, Maximum
Additional borrowing capacity under revolving credit facility
Line of Credit Facility, Current Borrowing Capacity
Outstanding letters of credit
Letters of Credit Outstanding, Amount
Debt Instruments [Abstract]
Senior unsecured notes repaid
Debt outstanding
Interest Revenue (Expense), Net [Abstract]
Interest expense
Interest Expense
Interest income
Investment Income, Interest
Interest expense, net