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Schedule of Other Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Indefinite-lived intangible assets $ 68 $ 71
Finite-Lived Intangible Assets 76 80
Intangible Assets, Gross (Excluding Goodwill) 144 151
Accumulated Amortization 63 66
Lloyds syndicate capacity [Member]    
Indefinite-lived intangible assets 52 55
Agency Force [Member]    
Indefinite-lived intangible assets 16 16
Value of business acquired [Member]    
Finite-Lived Intangible Assets 57 60
Accumulated Amortization $ 57 61
Trade name [Member]    
Economic useful life measured in years 8 years  
Finite-Lived Intangible Assets $ 7 8
Accumulated Amortization $ 3 3
Distribution channel [Member]    
Economic useful life measured in years 15 years  
Finite-Lived Intangible Assets $ 12 12
Accumulated Amortization $ 3 $ 2
Minimum [Member] | Value of business acquired [Member]    
Economic useful life measured in years 1 year  
Maximum [Member] | Value of business acquired [Member]    
Economic useful life measured in years 4 years