Investment Securities (Details Textuals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Investment Securities (Details) [Abstract]
Other-than-temporary impairments recognized during the period			$ 0		$ 0
Gain on sale of securities	$ 1	$ 20	1	$ 100
Losses on sale of securities	$ 0	$ 0	$ 0	$ 0