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Income Taxes (Changes in Valuation Allowances) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Balance at beginning of period	$ 621	$ 10,390	$ 4,985
Charged to costs and expenses		(2,677)	5,522
Deductions	(621)	(7,092)	(117)
Balance at end of period	$ 0	$ 621	$ 10,390

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

Name:	atge_ValuationAllowanceDeferredTaxAssetChargedToCostsAndExpense
Namespace Prefix:	atge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration