v2.4.0.8
Schedule of Share Based Compensation Shares Issued as Result of Executive Option under Various Plans (Parenthetical) (Detail)
1 Months Ended
Apr. 30, 2013
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock granted to employee 2,289  
Options Outstanding, Number of Shares   8,061,491
Restricted stock units
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options Outstanding, Number of Shares   2,156,312
Market Performance Based Restricted Stock Units
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options Outstanding, Number of Shares   604,630