Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at the beginning of period at Jun. 30, 2020	$ 807	$ 504,434	$ 1,927,568	$ (9,055)	$ (1,113,333)	$ 1,310,421
Balance at the beginning of period (in shares) at Jun. 30, 2020	80,665				28,794
Net income attributable to Adtalem			67,897			67,897
Other comprehensive income (loss), net of tax				1,299		1,299
Reclassification adjustment for realized gain on foreign currency translation adjustments						0
Reclassification adjustment for unrealized loss on interest rate swap						0
Stock-based compensation		11,252				11,252
Net activity from stock-based compensation awards	$ 4	994			$ (4,253)	(3,255)
Net activity from stock-based compensation awards (in shares)	401				129
Proceeds from stock issued under Colleague Stock Purchase Plan		(53)			$ 231	178
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(6)
Repurchases of common stock for treasury					$ (81,568)	(81,568)
Repurchases of common stock for treasury (in shares)					2,449
Balance at the end of period at Mar. 31, 2021	$ 811	516,627	1,995,465	(7,756)	$ (1,198,923)	$ 1,306,224
Balance at the end of period (in shares) at Mar. 31, 2021	81,066				31,366	49,700
Balance at the beginning of period at Jun. 30, 2020	$ 807	504,434	1,927,568	(9,055)	$ (1,113,333)	$ 1,310,421
Balance at the beginning of period (in shares) at Jun. 30, 2020	80,665				28,794
Repurchases of common stock for treasury						(100,000)
Balance at the end of period at Jun. 30, 2021	$ 811	519,826	2,005,105	(7,365)	$ (1,217,307)	$ 1,301,070
Balance at the end of period (in shares) at Jun. 30, 2021	81,099				31,846	49,253
Balance at the beginning of period at Dec. 31, 2020	$ 810	512,102	1,970,813	(7,711)	$ (1,162,235)	$ 1,313,779
Balance at the beginning of period (in shares) at Dec. 31, 2020	81,021				30,389
Net income attributable to Adtalem			24,652			24,652
Other comprehensive income (loss), net of tax				(45)		(45)
Reclassification adjustment for realized gain on foreign currency translation adjustments						0
Reclassification adjustment for unrealized loss on interest rate swap						0
Stock-based compensation		3,595				3,595
Net activity from stock-based compensation awards	$ 1	941			$ (180)	762
Net activity from stock-based compensation awards (in shares)	45				5
Proceeds from stock issued under Colleague Stock Purchase Plan		(11)			$ 97	86
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(3)
Repurchases of common stock for treasury					$ (36,605)	(36,605)
Repurchases of common stock for treasury (in shares)					975
Balance at the end of period at Mar. 31, 2021	$ 811	516,627	1,995,465	(7,756)	$ (1,198,923)	$ 1,306,224
Balance at the end of period (in shares) at Mar. 31, 2021	81,066				31,366	49,700
Balance at the beginning of period at Jun. 30, 2021	$ 811	519,826	2,005,105	(7,365)	$ (1,217,307)	$ 1,301,070
Balance at the beginning of period (in shares) at Jun. 30, 2021	81,099				31,846	49,253
Net income attributable to Adtalem			309,691			$ 309,691
Other comprehensive income (loss), net of tax				12		12
Reclassification adjustment for realized gain on foreign currency translation adjustments				(1,551)		(1,551)
Reclassification adjustment for unrealized loss on interest rate swap				6,695		6,695
Stock-based compensation		19,240				19,240
Net activity from stock-based compensation awards	$ 7	8,426			$ (2,727)	5,706
Net activity from stock-based compensation awards (in shares)	660				78
Proceeds from stock issued under Colleague Stock Purchase Plan		(61)			$ 505	444
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(13)
Repurchases of common stock for treasury					$ (120,000)	(120,000)
Repurchases of common stock for treasury (in shares)					4,710
Equity forward contract		(30,000)				(30,000)
Balance at the end of period at Mar. 31, 2022	$ 818	517,431	2,314,796	(2,209)	$ (1,339,529)	$ 1,491,307
Balance at the end of period (in shares) at Mar. 31, 2022	81,759				36,621	45,138
Balance at the beginning of period at Dec. 31, 2021	$ 817	542,296	1,964,954	(634)	$ (1,219,543)	$ 1,287,890
Balance at the beginning of period (in shares) at Dec. 31, 2021	81,705				31,908
Net income attributable to Adtalem			349,842			349,842
Other comprehensive income (loss), net of tax				(24)		(24)
Reclassification adjustment for realized gain on foreign currency translation adjustments				(1,551)		(1,551)
Reclassification adjustment for unrealized loss on interest rate swap						0
Stock-based compensation		4,953				4,953
Net activity from stock-based compensation awards	$ 1	232			$ (209)	24
Net activity from stock-based compensation awards (in shares)	54				9
Proceeds from stock issued under Colleague Stock Purchase Plan		(50)			$ 223	173
Proceeds from stock issued under Colleague Stock Purchase Plan (in shares)					(6)
Repurchases of common stock for treasury					$ (120,000)	(120,000)
Repurchases of common stock for treasury (in shares)					4,710
Equity forward contract		(30,000)				(30,000)
Balance at the end of period at Mar. 31, 2022	$ 818	$ 517,431	$ 2,314,796	$ (2,209)	$ (1,339,529)	$ 1,491,307
Balance at the end of period (in shares) at Mar. 31, 2022	81,759				36,621	45,138