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Commitments and Contingencies - Additional Information (Detail)
€ in Millions, $ in Millions
Jul. 31, 2014
EUR (€)
Jul. 01, 2013
USD ($)
Commitments and Contingencies [Line Items]    
Purchase commitment amount under Insulin Supply Agreement | € € 120.1  
Deerfield | Milestone Rights Liability | Maximum    
Commitments and Contingencies [Line Items]    
Contingent liability for milestone payments   $ 90.0