Amount before tax of income (loss) from a discontinued operation other than gain (loss) on disposal.

No definition available.

Name:	atge_DiscontinuedOperationIncomeLossFromDiscontinuedOperationOtherThanGainLossOnDisposalBeforeIncomeTax
Namespace Prefix:	atge_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Discontinued Operations (Details) - USD ($) $ in Millions		3 Months Ended		82 Months Ended
Discontinued Operations (Details) - USD ($) $ in Millions	Dec. 11, 2018	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025
Earn out received				$ 19.5
Income (loss) on disposal of discontinued operations before income taxes		$ 0.8	$ (0.1)
DeVry University
Earn out maximum	$ 20.0
Earn out term	10 years