SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Summary Of Significant Accounting Policies [Line Items]
Reserves related to uncollectible accounts and refunds	$ 28,000	$ 25,000
Net balance of capitalized software development costs	$ 13,500	$ 5,900
Anti-dilutive shares excluded from computations of earnings per share	980	1,682	2,803
Cumulative translation losses	$ 142,600	$ 59,400
Advertising expense	80,500	75,600	$ 68,300
Provisions For Refund Payments	16,900	15,500	14,600
Cost of Goods and Services Sold, Total	645,604	638,245	568,950
Insurance Settlements Receivable	21,900
Loss from Catastrophes	63,300
Unusual or Infrequent Item, or Both, Insurance Proceeds	59,000
Singularity University [Member]
Summary Of Significant Accounting Policies [Line Items]
Cost Method Investments	$ 5,000
Cost Method Investments Interest percentage	3.68%
DeVry University [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 34,700
Carrington Operations [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of Long-Lived Assets Held-for-use	17,200
Accounting Standards Update 2016-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative Effect on Retained Earnings, Tax	200
Cumulative Effect on Retained Earnings, before Tax	600
Noncontrolling Interest
Summary Of Significant Accounting Policies [Line Items]
Cumulative translation losses	3,000	1,300
Educational Services
Summary Of Significant Accounting Policies [Line Items]
Provision for Doubtful Accounts	16,900	19,000	$ 15,400
Hurricane Expense [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of Long-Lived Assets Held-for-use	31,000
Cost of Goods and Services Sold, Total	$ 13,400
Minimum
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	20.00%
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Finite-Lived Intangible Asset, Useful Life	18 years
Buildings And Leasehold Improvements [Member] | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Buildings And Leasehold Improvements [Member] | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Computer Furniture And Equipment [Member] | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Computer Furniture And Equipment [Member] | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	8 years
Adtalem Brazil
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	97.90%
Adtalem Global Education Inc.
Summary Of Significant Accounting Policies [Line Items]
Cumulative translation losses	$ 139,600	58,100
Tax effect on unrealized gains on available-for-sale securities	400	300
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	$ 100	$ 200
Edupristine
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	69.00%
Kaizen
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	31.00%
Adtalem Brazil Senior Management Group
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	2.10%