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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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