XL Group plc is an insurance and reinsurance company providing property, casualty and specialty products to industrial, commercial and professional firms, insurance companies and other enterprises. The Company operates through two segments: Insurance and Reinsurance. The Company's Insurance segment is organized into four product divisions: Global Casualty (Casualty); Global Energy Property, & Construction (EPC); Global Professional (Professional), and Global Specialty (Specialty). Its insurance operations provide insurance policies for corporate risks that may require large limits, use of a captive insurance company and the need for a program of locally issued policies. The Reinsurance segment provides casualty, property risk, property catastrophe, specialty, and other reinsurance lines on a global basis with business being written on both a proportional and non-proportional treaty basis, and also on a facultative basis.