Goodwill and Other Intangibles (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2014	Sep. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill acquired during period	$ 16		$ 16
Goodwill decrease due to the sale of a small annuity subsidiary		(1)			(1)
Amortizable intangible assets related to property and casualty insurance acquisitions			49	14
Accumulated amortization			91	75
Amortization of intangible assets			19	14	14
Weighted average useful life of finite-lived intangible assets acquired			6 years
Future amortization of intangibles in next year			8
Future amortization of intangibles in year two			8
Future amortization of intangibles in year three			8
Future amortization of intangibles in year four			8
Future amortization of intangibles in year five			8
Future amortization of intangibles after year five			$ 9