INCOME TAXES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Contingency [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 74,500
Effective Income Tax Rate Reconciliation, Percent	42.30%	7.30%	16.80%
Income Tax Expense Benefit Special Items	$ 48,900	$ 19,700
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	28.10%	35.00%	35.00%
Transition Tax Expenses	$ 96,300
Effective Income Tax Rate Reconciliation Impact On Foreign Tax Rate	10.50%
Other Income Tax Expense Benefit Continuing Operations Tax Act	$ 103,900
Income Tax Deferred Taxes Impact Tax Act	4,900
State Income And Foreign With holding Taxes Un distributed Foreign Earnings Tax Act	$ 2,700
Effective Income Tax Rate Continuing Operations Excluding Special Items	19.10%	16.00%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 2,600	$ 2,000	$ 1,600
Income Tax Examination, Penalties and Interest Expense	600	400	200
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	34,400	6,700
Deferred Tax Assets, Valuation Allowance	11,496	9,456	8,624
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	314,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	58,100
Unrecognized Tax Benefits	34,404	$ 7,901	$ 7,497	$ 8,475
Decrease in Unrecognized Tax Benefits is Reasonably Possible	600
Adtalem Brazil [Member]
Income Tax Contingency [Line Items]
Income Tax Expense Benefit Special Items	$ 8,800
Minimum [Member] | Scenario, Plan [Member]
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	28.10%