Trading Assets

3 Months Ended

Mar. 31, 2012

Trading Securities [Abstract]

Trading Assets [Text Block]

Trading Assets

The composition of trading assets was as follows.

($ in millions)	March 31, 2012		December 31, 2011
Mortgage-backed residential trading securities	$	883	$	608
Trading derivatives	12		14
Total trading assets	$	895	$	622