Acquisitions and Dispositions (Narrative) (Details)	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Education division and other businesses [Member] business	Jun. 30, 2013 Kaplan [Member]	Jun. 30, 2013 Other Businesses [Member] business
Business Acquisition [Line Items]
Number of businesses acquired	4		2
Percent of noncontrolling interest purchased		15.00%