XML 72 R40.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Acquisitions - Narrative (Details) $ in Millions | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2019 USD ($) | Sep. 17, 2019 brand | Aug. 31, 2019 USD ($) | Nov. 30, 2018 USD ($) | Aug. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 1,115.5 |  | $ 967.3 | $ 966.9 | $ 970.6
The Luminaires Group (TLG) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of niche lighting brands | brand |  | 5 |  |  |
Fiscal 2020 Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | 147.8 |  |  |  |
Identified intangible assets | $ 165.0 |  |  |  |
Weighted average useful life of acquired intangible assets | 13 years |  |  |  |

X
- Definition Business Combination, Acquired Entity, Number of Lighting Brands + References No definition available. + Details
Name: | ayi_BusinessCombinationAcquiredEntityNumberofLightingBrands
Namespace Prefix: | ayi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ayi_TheLuminairesGroupTLGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ayi_Fiscal2020AcquisitionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |