XML 54 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1
Acquisition and Disposals - Catlin - Fair value of assets and liabilities acquired (Narrative) (Details) - Catlin Group Limited - USD ($)
$ in Millions
9 Months Ended
May 01, 2015
Sep. 30, 2017
Business Acquisition [Line Items]    
Goodwill $ 794.0  
Indefinite-lived intangible assets acquired during the period 673.0  
Definite lived intangible assets acquired 315.0  
Amortization period of value of business acquired   2 years
Amortization period of adjustment to unpaid losses and loss adjustment expenses   20 years
Insurance Segment    
Business Acquisition [Line Items]    
Goodwill 466.1  
Reinsurance Segment    
Business Acquisition [Line Items]    
Goodwill $ 327.9