$AYI
ACUITY BRANDS INC Stock $ayi

$ayi Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-K Financial Statement

#000114421520000125 Filed on October 23, 2020

Income Statement

Concept	2020 Q3	2020 Q2	2020 Q1
Revenue	$891.2M	$776.2M	$824.2M
YoY Change	-5.0%	-18.09%	-3.53%
Cost Of Revenue	$516.1M	$448.6M	$480.3M
YoY Change	-5.02%	-20.46%	-7.72%
Gross Profit	$375.1M	$327.6M	$343.9M
YoY Change	-4.97%	-14.6%	2.99%
Gross Profit Margin	42.09%	42.21%	41.73%
Selling, General & Admin	$250.1M	$241.3M	$260.9M
YoY Change	-1.88%	-8.39%	9.81%
% of Gross Profit	66.68%	73.66%	75.87%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$25.80M	$25.50M	$25.60M
YoY Change	14.16%	13.84%	16.36%
% of Gross Profit	6.88%	7.78%	7.44%
Operating Expenses	$261.0M	$241.3M	$260.9M
YoY Change	-0.61%	-8.39%	9.81%
Operating Profit	$114.1M	$83.00M	$81.40M
YoY Change	-13.63%	-31.01%	-15.12%
Interest Expense	-$3.900M	$6.100M	$6.800M
YoY Change	-49.35%	-32.97%	-25.27%
% of Operating Profit	-3.42%	7.35%	8.35%
Other Income/Expense, Net	-$4.400M	-$4.500M	-$6.700M
YoY Change	109.52%	-47.06%	-30.93%
Pretax Income	$97.60M	$78.50M	$74.70M
YoY Change	-19.0%	-29.79%	-13.34%
Income Tax	$23.90M	$18.10M	$17.50M
% Of Pretax Income	24.49%	23.06%	23.43%
Net Earnings	$73.70M	$60.40M	$57.20M
YoY Change	-23.31%	-31.67%	-13.73%
Net Earnings / Revenue	8.27%	7.78%	6.94%
Basic Earnings Per Share	$1.88	$1.53	$1.45
Diluted Earnings Per Share	$1.87	$1.52	$1.44
COMMON SHARES
Basic Shares Outstanding		39.50M shares	39.50M shares
Diluted Shares Outstanding		39.70M shares	39.70M shares

Balance Sheet

Concept	2020 Q3	2020 Q2	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$560.7M	$520.6M	$380.6M
YoY Change	21.63%	56.01%	64.05%
Cash & Equivalents	$560.7M	$520.6M	$380.6M
Short-Term Investments
Other Short-Term Assets	$58.60M	$53.10M	$71.90M
YoY Change	-25.82%	-23.04%	6.52%
Inventory	$320.1M	$355.3M	$348.6M
Prepaid Expenses
Receivables	$500.3M	$451.3M	$506.7M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.440B	$1.380B	$1.308B
YoY Change	-0.15%	0.07%	6.1%
LONG-TERM ASSETS
Property, Plant & Equipment	$270.5M	$275.1M	$279.3M
YoY Change	-2.45%	-1.93%	-1.72%
Goodwill	$1.080B	$1.086B	$1.090B
YoY Change	11.65%	12.69%	12.5%
Intangibles	$605.9M	$612.9M	$628.8M
YoY Change	30.02%	29.55%	30.35%
Long-Term Investments
YoY Change
Other Assets	$29.50M	$29.00M	$29.70M
YoY Change	66.67%	36.15%	23.24%
Total Long-Term Assets	$2.052B	$2.062B	$2.089B
YoY Change	18.57%	18.38%	18.74%
TOTAL ASSETS
Total Short-Term Assets	$1.440B	$1.380B	$1.308B
Total Long-Term Assets	$2.052B	$2.062B	$2.089B
Total Assets	$3.492B	$3.442B	$3.397B
YoY Change	10.06%	10.29%	13.53%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$326.5M	$331.3M	$333.5M
YoY Change	-3.63%	-12.54%	-5.01%
Accrued Expenses	$266.8M	$226.8M	$223.3M
YoY Change	7.49%	-6.71%	-1.33%
Deferred Revenue	$5.400M	$6.600M	$7.000M
YoY Change	14.89%	-22.35%	59.09%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$24.30M	$17.80M	$15.40M
YoY Change	167.03%	95.6%	120.0%
Total Short-Term Liabilities	$617.6M	$575.9M	$572.2M
YoY Change	3.61%	-8.73%	-2.09%
LONG-TERM LIABILITIES
Long-Term Debt	$376.8M	$385.8M	$390.8M
YoY Change	8.43%	11.02%	11.75%
Other Long-Term Liabilities	$2.500M	$117.5M	$118.8M
YoY Change	-51.92%	19.05%	25.18%
Total Long-Term Liabilities	$379.3M	$503.3M	$509.6M
YoY Change	7.54%	12.8%	14.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$617.6M	$575.9M	$572.2M
Total Long-Term Liabilities	$379.3M	$503.3M	$509.6M
Total Liabilities	$1.364B	$1.347B	$1.352B
YoY Change	8.83%	8.93%	13.58%
SHAREHOLDERS EQUITY
Retained Earnings	$2.523B	$2.455B	$2.400B
YoY Change	9.91%	11.33%	13.1%
Common Stock	$964.1M	$958.5M	$951.1M
YoY Change	3.61%	3.6%	3.61%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.230B	$1.156B	$1.156B
YoY Change	6.03%	2.93%	2.93%
Treasury Stock Shares	15.00M shares	14.33M shares	14.33M shares
Shareholders Equity	$2.128B	$2.096B	$2.045B
YoY Change
Total Liabilities & Shareholders Equity	$3.492B	$3.442B	$3.397B
YoY Change	10.06%	10.29%	13.53%

Cashflow Statement

Concept	2020 Q3	2020 Q2	2020 Q1
OPERATING ACTIVITIES
Net Income	$73.70M	$60.40M	$57.20M
YoY Change	-23.31%	-31.67%	-13.73%
Depreciation, Depletion And Amortization	$25.80M	$25.50M	$25.60M
YoY Change	14.16%	13.84%	16.36%
Cash From Operating Activities	$126.5M	$163.6M	$85.10M
YoY Change	-30.76%	32.26%	50.62%
INVESTING ACTIVITIES
Capital Expenditures	-$16.60M	-$13.40M	-$13.30M
YoY Change	25.76%	-10.07%	22.02%
Acquisitions
YoY Change
Other Investing Activities	-$200.0K	-$100.0K	-$1.100M
YoY Change	-93.1%		-650.0%
Cash From Investing Activities	-$16.80M	-$13.50M	-$14.40M
YoY Change	4.35%	-9.4%	34.58%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-77.10M	-8.100M	44.40M
YoY Change	96.68%	44.64%	-251.54%
NET CHANGE
Cash From Operating Activities	126.5M	163.6M	85.10M
Cash From Investing Activities	-16.80M	-13.50M	-14.40M
Cash From Financing Activities	-77.10M	-8.100M	44.40M
Net Change In Cash	32.60M	142.0M	115.1M
YoY Change	-74.41%	37.6%	597.58%
FREE CASH FLOW
Cash From Operating Activities	$126.5M	$163.6M	$85.10M
Capital Expenditures	-$16.60M	-$13.40M	-$13.30M
Free Cash Flow	$143.1M	$177.0M	$98.40M
YoY Change	-26.95%	27.71%	45.99%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--08-31
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001144215
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201409Member
CY2020	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
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CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2600000	USD
CY2019Q3	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	0	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.52
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.52
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.52
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	53778155	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	53885165	shares
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2019Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	14325197	shares
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	15012449	shares
CY2019Q3	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	144900000	USD
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-08-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity Registrant Name EntityRegistrantName	ACUITY BRANDS, INC
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity File Number EntityFileNumber	001-16583
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	58-2632672
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	1170 Peachtree Street, N.E.
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 2300
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Atlanta
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	GA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	30309
CY2020	dei	City Area Code CityAreaCode	404
CY2020	dei	Local Phone Number LocalPhoneNumber	853-1400
CY2020	dei	Security12b Title Security12bTitle	Common stock, $0.01 par value per share
CY2020	dei	Trading Symbol TradingSymbol	AYI
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2020	us-gaap	Net Income Loss NetIncomeLoss	248300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	330400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	349600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	11900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-11500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-25200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-36600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4000000.0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	267000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	25100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-21200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18700000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	345600000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	248300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	330400000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	349600000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	101100000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	88300000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	80300000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	38200000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	29200000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	32300000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-300000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-900000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-600000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8800000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-6700000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	9300000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-38200000	USD
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	5400000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-74500000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-97700000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	62800000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-38000000.0	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-70800000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	74400000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-12900000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	34000000.0	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-700000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-19600000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-111500000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	52500000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-9000000.0	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-13600000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-16300000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	504800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	494700000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	351500000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	54900000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	53000000.0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	298400000	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	900000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	43600000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	200000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	303000000.0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2900000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	163200000	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	1100000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2100000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2900000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1700000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-359800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-53000000.0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-204000000.0	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	400000000.0	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	86500000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	395400000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	5000000.0	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	86500000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	395400000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	350700000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	400000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	400000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	69300000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	81600000	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	600000	USD
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1700000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5400000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	6000000.0	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	8200000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20800000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20800000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	21400000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-50300000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-108200000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-326700000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5000000.0	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1600000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-2800000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	99700000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	331900000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-182000000.0	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	461000000.0	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	129100000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	311100000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	560700000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	461000000.0	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	129100000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	64600000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	92900000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	126600000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	29800000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	35600000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	36700000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	1665600000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	349600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4000000.0	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	23700000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	600000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	21400000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1100000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1100000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	298400000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1716800000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	330400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-36600000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	23100000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	248300000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	600000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	20800000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	81600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18700000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	32700000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1918900000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	199200000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	800000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	20800000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	100000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	71200000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	2127500000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	Segment
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:9px;text-align:justify;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates.</span></div>
CY2019Q3	ayi	Accounts Receivable Sales Returns Reservefor Sales Returns AccountsReceivableSalesReturnsReserveforSalesReturns	23400000	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentrations of credit risk with respect to receivables, which are typically unsecured, are generally limited due to the wide variety of customers and markets using our lighting and building technology solutions as well as their dispersion across many different geographic areas.
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-top:17px;text-align:justify;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</span></div><div style="line-height:120%;padding-top:9px;text-align:justify;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;">Certain prior-period amounts have been reclassified to conform to the current year presentation. No material reclassifications occurred during the current period.</span></div>
CY2020Q3	us-gaap	Inventory Work In Process And Raw Materials InventoryWorkInProcessAndRawMaterials	170300000	USD
CY2019Q3	us-gaap	Inventory Work In Process And Raw Materials InventoryWorkInProcessAndRawMaterials	179400000	USD
CY2020Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	199100000	USD
CY2019Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	183700000	USD
CY2020Q3	us-gaap	Inventory Gross InventoryGross	369400000	USD
CY2019Q3	us-gaap	Inventory Gross InventoryGross	363100000	USD
CY2020Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	49300000	USD
CY2019Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	22300000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	320100000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	340800000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1100000000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	967300000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	41700000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	30800000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	970600000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2000000.0	USD
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-200000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-5100000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	967300000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	147800000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-41500000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	6400000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	1080000000.0	USD
CY2020	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P19Y
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	674000000.0	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	242400000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	523900000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	28500000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	40700000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	40600000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	40300000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	40100000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	33300000	USD
CY2020	us-gaap	Number Of Reporting Units NumberOfReportingUnits	1	reporting_unit
CY2020	ayi	Numberof Unimpaired Intangible Assets NumberofUnimpairedIntangibleAssets	12	intangible_asset
CY2020Q3	us-gaap	Deferred Costs DeferredCosts	12300000	USD
CY2019Q3	us-gaap	Deferred Costs DeferredCosts	15400000	USD
CY2020Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	6000000.0	USD
CY2019Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures Fair Value Disclosure InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure	0	USD
CY2020Q3	ayi	Researchand Development Tax Credit Receivable ResearchandDevelopmentTaxCreditReceivable	8600000	USD
CY2019Q3	ayi	Researchand Development Tax Credit Receivable ResearchandDevelopmentTaxCreditReceivable	0	USD
CY2020Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	2600000	USD
CY2019Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	2300000	USD
CY2020Q3	ayi	Other Long Term Assets OtherLongTermAssets	29500000	USD
CY2019Q3	ayi	Other Long Term Assets OtherLongTermAssets	17700000	USD
CY2020Q3	ayi	Investmentin Affiliates Numberof Unconsolidated Affiliates InvestmentinAffiliatesNumberofUnconsolidatedAffiliates	2	affiliate
CY2020Q3	ayi	Life Insurance Numberof Currentand Former Employees Covered LifeInsuranceNumberofCurrentandFormerEmployeesCovered	64	Employee
CY2020Q3	ayi	Deferred Compensation And Postretirement Defined Benefit Plans Liabilities Noncurrent DeferredCompensationAndPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	42700000	USD
CY2019Q3	ayi	Deferred Compensation And Postretirement Defined Benefit Plans Liabilities Noncurrent DeferredCompensationAndPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	41600000	USD
CY2020Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	18900000	USD
CY2019Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	17600000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2600000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5200000	USD
CY2020Q3	ayi	Other Long Term Liabilities OtherLongTermLiabilities	120000000.0	USD
CY2019Q3	ayi	Other Long Term Liabilities OtherLongTermLiabilities	110700000	USD
CY2020	ayi	Deferred Compensation Arrangement With Individual Automatic Contribution Rate DeferredCompensationArrangementWithIndividualAutomaticContributionRate	0.03
CY2020	ayi	Other Shipping And Handling Costs OtherShippingAndHandlingCosts	121900000	USD
CY2019	ayi	Other Shipping And Handling Costs OtherShippingAndHandlingCosts	138400000	USD
CY2018	ayi	Other Shipping And Handling Costs OtherShippingAndHandlingCosts	154900000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	38200000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	29200000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	32300000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6600000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6500000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8400000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1400000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1600000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	800000	USD
CY2020	us-gaap	Depreciation Depreciation	59400000	USD
CY2019	us-gaap	Depreciation Depreciation	57500000	USD
CY2018	us-gaap	Depreciation Depreciation	51800000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	802800000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	757700000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	532300000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	480400000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	270500000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	277300000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	82000000.0	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	74700000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	63900000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	15100000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	18500000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	20600000	USD
CY2020	us-gaap	Interest Expense InterestExpense	26400000	USD
CY2019	us-gaap	Interest Expense InterestExpense	36400000	USD
CY2018	us-gaap	Interest Expense InterestExpense	35500000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	3100000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	3100000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	2000000.0	USD
CY2020	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-23300000	USD
CY2019	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-33300000	USD
CY2018	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	-33500000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	5400000	USD
CY2019	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-42600000	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-6000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-36600000	USD
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	11300000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-7400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18700000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	11900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	11900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-11500000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-11500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-25200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-25200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-700000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-100000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-40800000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-9700000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-31100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	18400000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	4400000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	14000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	4000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	3500000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	2600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	3100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	2400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-5600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-1300000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-4300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-4100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-1000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-3100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-6800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-2000000.0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-4800000	USD
CY2020	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Ibefore Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIbeforeTax	0	USD
CY2020	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Loss Reclassification Adjustmentfrom Aoci Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossReclassificationAdjustmentfromAOCITax	0	USD
CY2020	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Iafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIafterTax	0	USD
CY2019	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Ibefore Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIbeforeTax	400000	USD
CY2019	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Loss Reclassification Adjustmentfrom Aoci Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossReclassificationAdjustmentfromAOCITax	100000	USD
CY2019	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Iafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIafterTax	300000	USD
CY2018	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Ibefore Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIbeforeTax	0	USD
CY2018	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Loss Reclassification Adjustmentfrom Aoci Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossReclassificationAdjustmentfromAOCITax	0	USD
CY2018	ayi	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gains Losses Reclassification Adjustmentfrom Aoc Iafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainsLossesReclassificationAdjustmentfromAOCIafterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-8900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	32800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	7700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	25100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-28300000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-21200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	20800000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	2100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-44300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-7700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-36600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	3100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	7100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4000000.0	USD
CY2020Q3	ayi	Investmentin Affiliates Numberof Unconsolidated Affiliates InvestmentinAffiliatesNumberofUnconsolidatedAffiliates	2	affiliate
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.019
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	18500000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	14900000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	12300000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9700000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	9000000.0	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	14400000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	78800000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4800000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	74000000.0	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	18100000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	2300000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2800000	USD
CY2020	us-gaap	Lease Cost LeaseCost	23200000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	22600000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	22300000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	18700000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	27200000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	401100000	USD
CY2019Q3	us-gaap	Long Term Debt LongTermDebt	356600000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	24300000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	20200000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	355300000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	300000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	300000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	700000	USD
CY2020Q3	us-gaap	Recorded Unconditional Purchase Obligation Due Within One Year RecordedUnconditionalPurchaseObligationDueWithinOneYear	301500000	USD
CY2020Q3	us-gaap	Recorded Unconditional Purchase Obligation Due In Second Year RecordedUnconditionalPurchaseObligationDueInSecondYear	5100000	USD
CY2020Q3	ayi	Recorded Unconditional Purchase Obligation Dueafter Second Year RecordedUnconditionalPurchaseObligationDueafterSecondYear	0	USD
CY2020	ayi	Standard Product Warranty Period StandardProductWarrantyPeriod	P5Y
CY2019Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11500000	USD
CY2018Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	27300000	USD
CY2017Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	22000000.0	USD
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	32000000.0	USD
CY2019	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	18700000	USD
CY2018	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	32400000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	27500000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	19700000	USD
CY2018	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	27700000	USD
CY2020	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	100000	USD
CY2019	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	0	USD
CY2018	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	600000	USD
CY2020	ayi	Standard Product Warranty Accrual Increase Decreasefor New Accounting Pronouncements StandardProductWarrantyAccrualIncreaseDecreaseforNewAccountingPronouncements	0	USD
CY2019	ayi	Standard Product Warranty Accrual Increase Decreasefor New Accounting Pronouncements StandardProductWarrantyAccrualIncreaseDecreaseforNewAccountingPronouncements	-14800000	USD
CY2018	ayi	Standard Product Warranty Accrual Increase Decreasefor New Accounting Pronouncements StandardProductWarrantyAccrualIncreaseDecreaseforNewAccountingPronouncements	0	USD
CY2020Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	16100000	USD
CY2020Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2019Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11500000	USD
CY2018Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	27300000	USD
CY2020Q3	us-gaap	Contract With Customer Right To Recover Product ContractWithCustomerRightToRecoverProduct	10300000	USD
CY2019Q3	us-gaap	Contract With Customer Right To Recover Product ContractWithCustomerRightToRecoverProduct	13900000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	5400000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	4700000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	53600000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	46400000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	4700000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3326300000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3672700000	USD
CY2020Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020	us-gaap	Restructuring Charges RestructuringCharges	20000000.0	USD
CY2020Q3	us-gaap	Restructuring Reserve RestructuringReserve	3000000.0	USD
CY2019Q3	us-gaap	Restructuring Reserve RestructuringReserve	1900000	USD
CY2020	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	9300000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	8200000	USD
CY2020Q3	us-gaap	Restructuring Reserve RestructuringReserve	3000000.0	USD
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	15000000.0	shares
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	14300000	shares
CY2020Q3	us-gaap	Treasury Stock Value TreasuryStockValue	1230000000	USD
CY2019Q3	us-gaap	Treasury Stock Value TreasuryStockValue	1160000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	248300000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	330400000	USD
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	349600000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39500000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39700000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40900000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	100000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	100000	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	100000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39600000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39800000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	41000000.0	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.29
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.32
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.54
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.27
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.29
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.52
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	54600000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	60300000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	88900000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12500000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	14700000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	16400000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	16000000.0	USD
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CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1400000	USD
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CY2020Q3	ayi	Deferred Tax Asset Operating Lease Rightofuse Asset DeferredTaxAssetOperatingLeaseRightofuseAsset	15600000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5300000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2800000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	197300000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	174400000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	2100000	USD
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CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	5600000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	6200000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	32000000.0	USD
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CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16600000	USD
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CY2020Q3	us-gaap	Noncurrent Assets NoncurrentAssets	366100000	USD
CY2019Q3	us-gaap	Noncurrent Assets NoncurrentAssets	297300000	USD
CY2018Q3	us-gaap	Noncurrent Assets NoncurrentAssets	308400000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	834700000	USD
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CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	73700000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.44
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
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CY2019Q2	us-gaap	Gross Profit GrossProfit	383600000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	394700000	USD
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CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.43
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CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.42

Files In Submission

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$AYI
ACUITY BRANDS INC Stock $ayi

2020 Q3 Form 10-K Financial Statement

#000114421520000125 Filed on October 23, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AYI ACUITY BRANDS INC Stock $ayi

2020 Q3 Form 10-K Financial Statement

#000114421520000125 Filed on October 23, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AYI
ACUITY BRANDS INC Stock $ayi