Long-Term Debt (Details 1) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Summary showing division of total long term debt
Obligations secured by real estate	$ 22	$ 59
Long-term debt	1,024	1,061
Senior unsecured obligations [Member]
Summary showing division of total long term debt
Unsecured obligations	852	852
Subordinated unsecured obligations [Member]
Summary showing division of total long term debt
Unsecured obligations	$ 150	$ 150