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INTANGIBLE ASSETS - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 04, 2017
Jun. 28, 2018
May 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Feb. 05, 2018
Nov. 01, 2017
Intangible Assets [Line Items]                    
Amortization of Intangible Assets           $ 9,538,000 $ 11,169,000 $ 5,192,000    
Indefinite-lived Intangible Assets, Period Increase (Decrease)           18,000,000        
Goodwill       $ 813,887,000   813,887,000 829,086,000      
Intangible Assets, Net (Excluding Goodwill)       $ 362,931,000   $ 362,931,000 391,958,000      
Percentage Of Intangible Assets Including Goodwill       50.00%   50.00%        
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)       $ 20,200,000 $ 1,600,000          
Goodwill, Impairment Loss         $ 22,200,000          
Goodwill, Acquired During Period           $ 17,163,000 274,689,000      
Indefinite-lived Intangible Assets (Excluding Goodwill)       317,950,000   317,950,000 335,938,000      
ACAMS [Member]                    
Intangible Assets [Line Items]                    
Impaired Intangible Asset, Method for Fair Value Determination     The key assumptions used in calculating the fair value of this trade name included a discount rate of 12.2%, a royalty rate of 5% and revenue growth of 13.6% over the forecast period. Assuming all other assumptions remained constant, if the discount rate increased to 14.6% calculated fair value would equal carrying value of this asset at May 31, 2018. Similarly, assuming all other assumptions remained constant, if the royalty rate decreased to 4.6% calculated fair value would equal carrying value at May 31, 2018.
              
DeVry University [Member]                    
Intangible Assets [Line Items]                    
Proceeds from Sales of Business, Affiliate and Productive Assets $ 1.00                  
US Education Holdings LLC [Member]                    
Intangible Assets [Line Items]                    
Proceeds from Sales of Business, Affiliate and Productive Assets   $ 1.00                
Indefinite-lived Intangible [Member]                    
Intangible Assets [Line Items]                    
Fair Value In Excess Of Carrying Value Minimum Percentage     35.00%              
Minimum Percentage of Premium of Fair Value Due to Increase in Discount Rate     22.00%              
Goodwill [Member]                    
Intangible Assets [Line Items]                    
Fair Value In Excess Of Carrying Value Minimum Percentage     55.00%              
Minimum Percentage of Premium of Fair Value Due to Increase in Discount Rate     41.00%              
Edupristine [Member]                    
Intangible Assets [Line Items]                    
Goodwill                 $ 11,527,000  
Indefinite-lived Intangible Assets Acquired           1,400,000        
Sao Judas Tadeu [Member]                    
Intangible Assets [Line Items]                    
Goodwill                   $ 5,636,000
Indefinite-lived Intangible Assets Acquired           200,000        
Professional Education [Member]                    
Intangible Assets [Line Items]                    
Amortization of Intangible Assets           6,501,000 7,482,000 563,000    
Goodwill       317,699,000   317,699,000 306,653,000      
Goodwill, Acquired During Period           11,527,000 274,689,000      
Indefinite-lived Intangible Assets (Excluding Goodwill)       69,126,000   69,126,000 67,812,000      
Technology And Business [Member]                    
Intangible Assets [Line Items]                    
Amortization of Intangible Assets           3,037,000 3,687,000 $ 4,629,000    
Goodwill, Acquired During Period           5,636,000 0      
Indefinite-lived Intangible Assets (Excluding Goodwill)       111,324,000   111,324,000 130,626,000      
Adtalem Brazil [Member]                    
Intangible Assets [Line Items]                    
Goodwill       $ 185,978,000   185,978,000 $ 212,223,000      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)           $ 400,000        
Impaired Intangible Asset, Method for Fair Value Determination     The key assumptions utilized in calculating the fair value of this reporting unit were a discount rate of 13.9%, revenue growth rate of 10% over the forecast period and a terminal growth rate of 5%. Assuming all other assumptions remained constant the discount rate for Adtalem Brazil would have to increase to 14.8% for the calculated fair value to equal carrying value of this reporting unit at May 31, 2018. Similarly, holding all other assumptions constant the terminal growth rate would have to decrease to 3.7% for calculated fair value to equal carrying value of Adtalem Brazil at May 31, 2018.
              
Adtalem Brazil [Member] | Indefinite-lived Intangible [Member]                    
Intangible Assets [Line Items]                    
Fair Value In Excess Of Carrying Value Minimum Percentage     10.00%              
Adtalem Brazil [Member] | Goodwill [Member]                    
Intangible Assets [Line Items]                    
Fair Value In Excess Of Carrying Value Percentage     12.00%              
Association Of Certified Anti-Money Laundering Specialists [Member]                    
Intangible Assets [Line Items]                    
Indefinite-lived Intangible Assets (Excluding Goodwill)     $ 39.9              
Association Of Certified Anti-Money Laundering Specialists [Member] | Indefinite-lived Intangible [Member]                    
Intangible Assets [Line Items]                    
Fair Value In Excess Of Carrying Value Minimum Percentage     10.00%              
Measurement Input, Discount Rate [Member] | Minimum [Member]                    
Intangible Assets [Line Items]                    
Weighted Average Discount Rate, Percent     11.20%              
Measurement Input, Discount Rate [Member] | Minimum [Member] | Indefinite-lived Intangible [Member]                    
Intangible Assets [Line Items]                    
Weighted Average Discount Rate, Percent     11.20%              
Measurement Input, Discount Rate [Member] | Maximum [Member]                    
Intangible Assets [Line Items]                    
Weighted Average Discount Rate, Percent     13.90%              
Measurement Input, Discount Rate [Member] | Maximum [Member] | Indefinite-lived Intangible [Member]                    
Intangible Assets [Line Items]                    
Weighted Average Discount Rate, Percent     13.90%