SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Net balance of capitalized software development costs	$ 11,200	$ 13,500	$ 3,400	$ 11,200	$ 3,400
Anti-dilutive shares excluded from computations of earnings per share	194,000		294,000	223,000	1,273,000
Cumulative translation losses	$ 148,800	142,600	$ 59,500	$ 148,800	$ 59,500
Advertising expense	21,700		22,100	61,900	59,500
Impairment of Long-Lived Assets Held-for-use				2,000
Cost of Goods and Services Sold, Total	156,339		159,312	463,224	489,931
Loss from Catastrophes			11,100	12,500	55,100
Deferred Revenue, Revenue Recognized				100,500
Allowance for Doubtful Accounts Receivable, Current	20,000	27,600	28,400	20,000	28,400
Asset Impairment Charges				39,100
Cumulative Effect on Retained Earnings, Net of Tax				0	(236)
Proceeds from Insurance Settlement, Operating Activities					20,800
Gain on Business Interruption Insurance Recovery	0		0	15,571	0
Accounting Standards Update 2016-01 [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				400
Noncontrolling Interest
Summary Of Significant Accounting Policies [Line Items]
Cumulative translation losses	$ 3,400	3,000	1,300	3,400	1,300
Hurricane Expense [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of Long-Lived Assets Held-for-use					29,900
Cost of Goods and Services Sold, Total					13,400
Asset Impairment [Member]
Summary Of Significant Accounting Policies [Line Items]
Unusual or Infrequent Item, or Both, Insurance Proceeds				$ 12,500	20,800
Minimum
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	20.00%			20.00%
Maximum
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage	50.00%			50.00%
Adtalem Brazil
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	97.90%			97.90%
Adtalem Global Education Inc.
Summary Of Significant Accounting Policies [Line Items]
Cumulative translation losses	$ 145,400	139,600	58,200	$ 145,400	58,200
Tax effect on unrealized gains on available-for-sale securities		400	300		300
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax		$ 100	$ 200		$ 200
Edupristine
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	69.00%			69.00%
Kaizen
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	31.00%			31.00%
Adtalem Brazil Senior Management Group
Summary Of Significant Accounting Policies [Line Items]
Ownership interest of parent in subsidiary	2.10%			2.10%