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Income Taxes (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2018 | Jun. 30, 2021 USD ($) item | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2017
Income Tax Contingency [Line Items] |  |  |  |  |  |
Operating Loss Carryforwards, Federal |  |  | $ 100 |  |  |
Operating Loss Carryforwards, State and Local |  | $ 270,000 | 301,500 |  |  |
Operating Loss Carryforwards, Foreign |  | 16,700 | 23,600 |  |  |
Valuation Allowance |  | $ 8,000 | $ 9,937 |  |  |
Number of operating units local tax incentives | item |  | 3 |  |  |  |
Number of active audits | item |  | 1 |  |  |  |
Effective Income Tax Rate Reconciliation, Percent |  | 19.90% | (2.70%) | 23.50% |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ 0 | $ 110,723 | $ 0 |  |
Tax benefit related to the loss on sale of Adtalem's investment in Carrington |  |  |  |  | $ (25,700) |
U.S. federal corporate tax rate | 21.00% | 21.00% | 21.00% | 21.00% |  | 35.00%
Effective Income Tax Rate Reconciliation Impact On Foreign Tax Rate |  |  |  | 10.50% |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  | $ 10,400 | $ 11,500 |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued |  | 1,900 | 1,500 |  |  |
Income Tax Examination, Penalties and Interest Expense |  | 400 | $ 0 | $ 100 |  |
Discontinued Operations, Disposed of by Sale | Adtalem Educational Do Brazil [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax |  | $ 110,700 |  |  |  |

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