Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Treasury stock, shares 1 2
Class A Common Stock
   
Common stock, shares issued 225 240
Class B Common Stock
   
Common stock, shares issued 729 725