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Income Taxes (Changes in Valuation Allowances) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Income Tax Disclosure [Abstract] |  |
Balance at beginning of period | $ 621 | $ 10,390
Charged to costs and expenses |  | (2,677)
Deductions | $ (621) | (7,092)
Balance at end of period |  | $ 621

X
- Definition Amount of change in the valuation allowance for a specified deferred tax asset that are charged to costs and expenses. + References No definition available. + Details
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Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of deductions in the valuation allowance for a specified deferred tax asset. + References No definition available. + Details
Name: | atge_ValuationAllowanceDeferredTaxAssetDeductions
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration