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Discontinued Operations (Narrative) (Details) (Education [Member], USD $)
In Millions, unless otherwise specified
6 Months Ended 3 Months Ended
Jun. 30, 2012
Sale of Kaplan Learning Technologies [Member]
Jun. 30, 2012
Sale of Kaplan EduNeering [Member]
Mar. 31, 2012
Sales of Kaplan EduNeering and Kaplan Learning Technologies [Member]
After-tax gain (loss) on sale $ (1.9) $ 18.5  
Income tax benefits in connection with sales of businesses     $ 23.2