Business Combinations (Narrative) (Details) (USD $) In Millions, unless otherwise specified		9 Months Ended			7 Months Ended
	Apr. 30, 2011 ATC International [Member]	Mar. 31, 2012 American University Of Caribbean [Member]	Aug. 03, 2011 American University Of Caribbean [Member]	Aug. 03, 2011 American University Of The Caribbean And Medical Education Services [Member]	Feb. 29, 2012 Faculdade Boa Viagem [Member]	Mar. 31, 2012 Faculdade Boa Viagem [Member]	Aug. 03, 2011 Trade Names [Member] American University Of Caribbean [Member]	Mar. 31, 2012 Trade Names [Member] Faculdade Boa Viagem [Member]	Aug. 03, 2011 AUC Title IV Eligibility And Accreditations [Member] American University Of Caribbean [Member]	Mar. 31, 2012 DeVry Brasil Accreditations [Member] Faculdade Boa Viagem [Member]
Business Acquisition [Line Items]
Cash paid in exchange for the business assets acquired	$ 4.8			$ 226.0	$ 24.2
Expected additional earn-out payment for business	4.3				21.9
Number of students		1,200			5,800
Number of graduates licensed and practicing medicine		4,000
Number of states in which graduates eligible to practice		50
Acquired intangible assets			$ 131.4			$ 19.1	$ 17.1	$ 2.3	$ 100.0	$ 13.5