Acquisitions and Dispositions (Narrative) (Details)	9 Months Ended	3 Months Ended
Sep. 30, 2013 Education division and other businesses [Member] business	Sep. 30, 2012 Education division and other businesses [Member] business	Jun. 30, 2013 Kaplan [Member]
Business Acquisition [Line Items]
Number of businesses acquired	5	4
Percent of noncontrolling interest purchased			15.00%

The number of businesses acquired by the entity during the period.

No definition available.

Name:	us-gaap_NumberOfBusinessesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration