v3.3.0.814
Stockholders' Equity Preferred and Common Stock (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Class of Stock [Line Items]          
Preferred stock, shares authorized 2,000   2,000    
Common stock, shares authorized 5,000   5,000    
Common stock, shares, issued 1,600   1,600   1,600
Common stock, shares, outstanding 1,600   1,600   1,600
Purchase of common stock, shares     85    
Purchase of common stock     $ 2,888 $ 168  
Common stock dividends $ 563 $ 483 $ 1,618 1,445  
Series A preferred stock [Member]          
Class of Stock [Line Items]          
Series A preferred stock dividends   $ 87   $ 263