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v3.20.2

Subsequent Event (Details) - shares | 2 Months Ended | 12 Months Ended | 30 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 22, 2020 | Aug. 31, 2020 | Aug. 31, 2020 | Oct. 23, 2020 | Mar. 31, 2018
March 2018 Repurchase Plan |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Reacquired shares of outstanding common stock |  | 700,000 | 2,100,000 |  |
Shares authorized for repurchase (shares) |  |  |  |  | 6,000,000
Subsequent Event | March 2018 Repurchase Plan |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Reacquired shares of outstanding common stock | 1,700,000 |  |  |  |
Subsequent Event | October 2020 Repurchase Plan |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Additional shares authorized for repurchase (shares) |  |  |  | 3,800,000 |
Shares authorized for repurchase (shares) |  |  |  | 6,000,000 |

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- Definition Stock Repurchase Program, Number of Additional Shares Authorized to be Repurchased + References No definition available. + Details
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Namespace Prefix: | ayi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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- Details
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Namespace Prefix: |
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Period Type: |