QUARTERLY FINANCIAL DATA (UNAUDITED) (Summary of Quarterly Data) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Revenue	$ 319,787	$ 310,070	$ 308,211	$ 293,143	$ 315,216	$ 299,138	$ 301,513	$ 292,042	$ 1,231,211	$ 1,207,909	$ 1,080,075
Operating Income from Continuing Operations	65,167	52,505	59,918	29,886	51,741	45,466	3,164	35,127	207,476	135,498	156,090
Amounts Attributable to Adtalem Global Education: [Abstract]
Income (Loss) from Continuing Operations	97,413	42,905	(51,841)	25,438	42,902	38,332	11,746	26,994	113,915	119,974	125,086
Loss from Discontinued Operations	(34,607)	(3,571)	(29,315)	(12,653)	(43)	1,527	2,667	(1,842)	(80,146)	2,309	(128,252)
Net Income Attributable to Adtalem Global Education	$ 62,806	$ 39,334	$ (81,156)	$ 12,785	$ 42,859	$ 39,859	$ 14,413	$ 25,152	$ 33,769	$ 122,283	$ (3,166)
Earnings Per Share, Basic [Abstract]
Continuing Operations	$ 1.60	$ 0.70	$ (0.85)	$ 0.41	$ 0.68	$ 0.60	$ 0.18	$ 0.43	$ 1.85	$ 1.89	$ 1.95
Discontinued Operations	(0.57)	(0.06)	(0.48)	(0.20)	0.00	0.02	0.04	(0.03)	(1.30)	0.04
Total	1.03	0.64	(1.33)	0.20	0.68	0.63	0.23	0.40	0.55	1.93	(0.05)
Earnings Per Share, Diluted [Abstract]
Continuing Operations	1.58	0.69	(0.85)	0.40	0.67	0.60	0.18	0.42	1.83	1.87	1.94
Discontinued Operations	(0.56)	(0.06)	(0.48)	(0.20)	0.00	0.02	0.04	(0.03)	(1.29)	0.04
Total	$ 1.02	$ 0.63	$ (1.33)	$ 0.20	0.67	0.62	0.23	0.39	0.54	1.91	(0.05)
Cash Dividends Declared per Common Share					$ 0	$ 0	$ 0.18	$ 0	$ 0	$ 0.18	$ 0.36