Schedule of Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Indefinite-lived intangible assets	$ 73	$ 74
Finite-Lived Intangible Assets	84	85
Accumulated Amortization	67	66
Total other intangible assets	157	159
Total intangible assets, accumulated amortization	67	66
Lloyds syndicate capacity [Member]
Indefinite-lived intangible assets	57	58
Agency Force [Member]
Indefinite-lived intangible assets	16	16
Value of business acquired [Member]
Finite-Lived Intangible Assets	63	64
Accumulated Amortization	63	63
Trade name [Member]
Economic useful life measured in years	8 years
Finite-Lived Intangible Assets	8	8
Accumulated Amortization	2	2
Distribution channel [Member]
Economic useful life measured in years	15 years
Finite-Lived Intangible Assets	13	13
Accumulated Amortization	$ 2	$ 1
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