Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 1,500,000,000 1,500,000,000
Common stock, shares issued 709,000,000 706,000,000
Common stock, shares outstanding 700,000,000 698,000,000
Treasury stock, shares 9,000,000 9,000,000