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Shareholders' Equity
12 Months Ended
Dec. 31, 2011
Shareholders' Equity [Abstract]  
Shareholders' Equity

L. SHAREHOLDERS' EQUITY

Authorized Stock. Our authorized capital stock consists of 500 million shares of $1 per share par value common stock and 50 million shares of $1 per share par value preferred stock. The preferred stock is issuable in series, with the rights, preferences and limitations of each series to be determined by our board of directors.

Shares Issued and Outstanding. We had 481,880,634 shares of common stock issued on December 31, 2010 and 2011. We had 372,052,313 and 356,437,880 shares of common stock outstanding on December 31, 2010, and 2011, respectively.No shares of our preferred stock were outstanding on either date. The only changes in our shares outstanding during 2011 resulted from shares issued under our equity compensation plans (see Note O for further discussion) and shares repurchased in the open market. In 2011, we repurchased 20 million shares at an average price of $69 per share. On October 5, 2011, our board of directors authorized our management to repurchase up to an additional 10 million shares, about 3 percent of our total shares outstanding.

Dividends per Share. Dividends declared per share were $1.52 in 2009, $1.68 in 2010 and $1.88 in 2011.

Accumulated Other Comprehensive Income. Accumulated other comprehensive income (loss) (AOCI) consisted of the following: