Investments and Derivative Instruments (Details Textual 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Assets	$ 188	$ 199
Other liabilities, variable interest entity liabilities	20	33
Company's maximum exposure to the loss of the contingent capital facility	178	177
Non-Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Assets	16	17
Other liabilities, variable interest entity liabilities	16	19
Company's maximum exposure to the loss of the contingent capital facility	$ 3	$ 3