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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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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% |  |

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