v3.2.0.727
Stockholders' Equity Preferred and Common Stock (Details) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 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     $ 1,999    
Common stock dividends $ 570 $ 481 $ 1,055 $ 962  
Common Share [Member]          
Class of Stock [Line Items]          
Purchase of Common Stock, Shares     55    
Purchase of Common Stock     $ 2,000    
Series A Preferred Stock [Member]          
Class of Stock [Line Items]          
Series A preferred stock dividends   $ 88   $ 176