| 18. | Share Repurchase Plan |
In March 2013, the Corporation announced a board authorized plan to repurchase up to $4 billion of outstanding common stock using proceeds from its announced asset divestiture program. From August through December 31, 2013, the Corporation purchased approximately 19.3 million shares for a total cost of approximately $1.54 billion, which is an average cost of $79.65 per share including transaction fees. As of December 31, 2013, the Corporation may purchase up to approximately $2.46 billion of additional common stock under its board authorized plan. The weighted average of common shares outstanding used in the earnings per share calculations for 2013 do not reflect the full amount of the stock repurchases, due to the timing of the purchases.