Nature of Operations (Details) $ in Thousands	3 Months Ended
Sep. 30, 2021 USD ($) item segment	Sep. 30, 2020 USD ($)
Number of reporting segments \| segment	4
Business acquisition and integration expense	$ 26,553	$ 13,436
Walden University
Minimum Number Of Courses Offered \| item	100
Walden University, LLC [Member]
Acquisition costs	$ 22,300	8,600
Business acquisition and integration expense	$ 26,600	$ 13,400

This element represents acquisition-related costs and integration-related costs incurred to effect a business combination which costs have been expensed during the period.

No definition available.

+ Details

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

- Definition

Minimum number of courses offered.

+ References

No definition available.

+ Details

Name:	atge_MinimumNumberOfCoursesOffered
Namespace Prefix:	atge_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=atge_WaldenUniversitySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=atge_WaldenUniversityLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: