Quarterly Financial Data (Unaudited) (Summary of Quarterly Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Quarterly Financial Data [Abstract]
Revenue	$ 361,231	$ 365,623	$ 371,198	$ 289,070	$ 223,466	$ 230,213	$ 234,396	$ 218,826	$ 1,387,122	$ 906,901	$ 866,427
Operating (loss) income	44,529	33,264	24,734	(22,063)	27,076	35,961	29,064	25,951	80,464	118,052	110,067
Amounts Attributable to Adtalem:
Net (loss) income from continuing operations	2,464	5,857	39,034	(77,182)	2,565	24,238	23,941	19,586	(29,827)	70,330	219,925
Net income (loss) from discontinued operations	5,550	343,985	(21,181)	19,178	6,447	414	(626)	344	347,532	6,579	(305,259)
Net income (loss) attributable to Adtalem	$ 8,014	$ 349,842	$ 17,853	$ (58,004)	$ 9,012	$ 24,652	$ 23,315	$ 19,930	$ 317,705	$ 76,909	$ (85,334)
Basic:
Continuing operations	$ 0.05	$ 0.12	$ 0.78	$ (1.55)	$ 0.05	$ 0.48	$ 0.46	$ 0.37	$ (0.62)	$ 1.37	$ 4.10
Discontinued operations	0.12	7.03	(0.43)	0.39	0.13	0.01	(0.01)	0.01	7.18	0.13	(5.69)
Total basic earnings (loss) per share	0.18	7.15	0.36	(1.17)	0.18	0.49	0.45	0.38	6.57	1.50	(1.59)
Diluted:
Continuing operations	0.05	0.12	0.78	(1.55)	0.05	0.47	0.46	0.37	(0.62)	1.36	4.07
Discontinued operations	0.12	6.97	(0.42)	0.39	0.13	0.01	(0.01)	0.01	7.18	0.13	(5.64)
Total diluted earnings (loss) per share	$ 0.18	$ 7.09	$ 0.36	$ (1.17)	$ 0.18	$ 0.48	$ 0.44	$ 0.38	$ 6.57	$ 1.49	$ (1.58)