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Restructuring Charges - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Employee
Oct. 31, 2012
Restructuring Charges
Minimum
Oct. 31, 2012
Restructuring Charges
Maximum
Sep. 30, 2012
Business, Technology and Management
Jun. 30, 2012
Business, Technology and Management
Jun. 30, 2012
Medical and Healthcare
Jun. 30, 2012
International K-12 and Professional Education
Restructuring And Other [Line Items]                
Number of employees reduced in connection with reduction in force (RIF)   570            
Restructuring Expenses   $ 7.1     $ 0.7 $ 5.0 $ 2.0 $ 0.1
Cash payment for Severance charges and restructuring charges 3.3              
Accrued severance and restructuring charges 3.1              
Expected loss on asset held for sale     $ (9) $ (10)