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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Jun. 30, 2017
Summary Of Significant Accounting Policies [Line Items]          
Reserves related to uncollectible accounts and refunds $ 36,200 $ 33,400 $ 36,200 $ 33,400 $ 30,600
Net balance of capitalized software development costs $ 3,400 $ 6,800 $ 3,400 $ 6,800 5,900
Anti-dilutive shares excluded from computations of earnings per share 294,000 1,670,000 1,273,000 2,514,000  
Cumulative translation losses $ 59,500 $ 37,300 $ 59,500 $ 37,300 59,400
Advertising expense 27,500 25,300 76,500 73,700  
Provisions For Refund Payments 4,800 4,000 13,900 12,200  
Impairment of Long-Lived Assets Held-for-use     29,900    
Cost of Goods and Services Sold, Total 179,736 182,216 554,647 548,850  
Insurance Settlements Receivable 20,800   20,800    
Loss from Catastrophes 11,100   55,100    
Unusual or Infrequent Item, or Both, Insurance Proceeds 11,100   50,900    
Discontinued Operations, Held-for-sale [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Impairment of Long-Lived Assets Held-for-use 5,700   29,100    
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 1,300 800 1,300 800 1,300
Educational Services          
Summary Of Significant Accounting Policies [Line Items]          
Provision for Doubtful Accounts 6,700 7,800 17,900 19,700  
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    
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 $ 58,200 36,500 $ 58,200 36,500 58,100
Tax effect on unrealized gains on available-for-sale securities 300 300 300 300 300
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax $ 200 $ 200 $ 200 $ 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%