Capital Stock (Capital stock) (Details)
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
---|---|---|---|---|
Class A Common Stock
|
||||
Common Stock, Shares Authorized | 1,000,000,000 | 1,000,000,000 | ||
Common Stock, Shares, Outstanding | 331,832,000 | 330,653,000 | 334,245,000 | 332,567,000 |
Class B Common Stock, Class B1 [Member]
|
||||
Common Stock, Shares, Outstanding | 600 | 600 | ||
Class B Common Stock, Class B2 [Member]
|
||||
Common Stock, Shares, Outstanding | 800 | 800 | ||
Class B Common Stock, Class B3 [Member]
|
||||
Common Stock, Shares, Outstanding | 1,300 | 1,300 | ||
Class B Common Stock, Class B4 [Member]
|
||||
Common Stock, Shares, Outstanding | 400 | 400 |