v2.4.0.8
Earnings per Common Share Textuals (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Common Share (Textual) [Abstract]        
Preferred stock dividends $ 246 $ 219 $ 486 $ 439