Consolidated Statements of Shareholders' Equity - USD ($) $ 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 - Net of Tax at Jun. 30, 2019	$ 801	$ 486,061	$ 2,012,902	$ (137,290)	$ (970,944)	$ 1,391,530
Net income attributable to Adtalem Global Education			19,886			19,886
Other comprehensive income (loss), net of tax				(21,828)		(21,828)
Stock-based compensation		8,594				8,594
Net activity from stock-based compensation awards	5	2,019			(5,275)	(3,251)
Repurchases of common shares for treasury					(100,019)	(100,019)
Balance at the end of period - Net of Tax at Dec. 31, 2019	806	496,674	2,032,788	(159,118)	(1,076,238)	1,294,912
Balance at the beginning of period - Net of Tax at Sep. 30, 2019	805	492,151	2,027,263	(176,739)	(1,016,287)	1,327,193
Net income attributable to Adtalem Global Education			5,525			5,525
Other comprehensive income (loss), net of tax				17,621		17,621
Stock-based compensation		3,369				3,369
Net activity from stock-based compensation awards	1	1,154			(187)	968
Repurchases of common shares for treasury					(59,764)	(59,764)
Balance at the end of period - Net of Tax at Dec. 31, 2019	806	496,674	2,032,788	(159,118)	(1,076,238)	1,294,912
Balance at the beginning of period - Net of Tax at Jun. 30, 2020	807	504,434	1,927,568	(9,055)	(1,113,333)	1,310,421
Net income attributable to Adtalem Global Education			43,245			43,245
Other comprehensive income (loss), net of tax				1,344		1,344
Stock-based compensation		7,657				7,657
Net activity from stock-based compensation awards	3	53			(4,073)	(4,017)
Proceeds from stock issued under Colleague Stock Purchase Plan		(42)			134	92
Repurchases of common shares for treasury					(44,963)	(44,963)
Balance at the end of period - Net of Tax at Dec. 31, 2020	810	512,102	1,970,813	(7,711)	(1,162,235)	1,313,779
Balance at the beginning of period - Net of Tax at Sep. 30, 2020	810	508,487	1,947,498	(8,612)	(1,117,212)	1,330,971
Net income attributable to Adtalem Global Education			23,315			23,315
Other comprehensive income (loss), net of tax				901		901
Stock-based compensation		3,648				3,648
Net activity from stock-based compensation awards					(152)	(152)
Proceeds from stock issued under Colleague Stock Purchase Plan		(33)			92	59
Repurchases of common shares for treasury					(44,963)	(44,963)
Balance at the end of period - Net of Tax at Dec. 31, 2020	$ 810	$ 512,102	$ 1,970,813	$ (7,711)	$ (1,162,235)	$ 1,313,779