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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2012
Accounting Policies [Abstract]  
Basic and Diluted Weighted Average Common Shares Outstanding [Table Text Block]
The table below presents the computations of basic and diluted weighted average common shares outstanding.
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
 
(Shares in millions)
Weighted average common shares outstanding—basic
 
5,762

 
 
5,730

 
5,762

 
5,714

Convertible preferred stock
 
131

 
 

 
131

 

Weighted average common shares outstanding—diluted
 
5,893

 
 
5,730

 
5,893

 
5,714