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TREASURY STOCK PURCHASE (Details) (USD $) | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Aug. 13, 2012 2011-2012 Repurchase Plan | Aug. 31, 2012 2011-2012 Repurchase Plan | Oct. 31, 2011 2011-2012 Repurchase Plan | Dec. 31, 2012 2011-2012 Repurchase Plan | Nov. 13, 2012 November 2012 Repurchase Plan | Dec. 31, 2012 November 2012 Repurchase Plan
TREASURY STOCK PURCHASE |  |  |  |  |  |  |  |  |
Amount of common stock the board of directors authorized to repurchase |  |  |  |  | $ 500,000,000 | $ 250,000,000 |  | $ 250,000,000 |
Additional amount of common stock authorized to be purchased by the Board of Directors |  |  |  | 250,000,000 |  |  |  |  |
Common stock repurchased (in shares) |  |  |  |  |  |  | 8,700,000 |  | 4,800,000
Average purchase price (in dollars per share) |  |  |  |  |  |  | $ 57.35 |  | $ 49.26
Additional shares purchased, subsequent to period |  |  |  |  |  |  |  |  | 257,000
Average purchase price, subsequent to period (in dollars per share) |  |  |  |  |  |  |  |  | $ 51.99
Common stock repurchased | 737,079,000 | 176,392,000 | 23,540,000 |  |  |  | 499,800,000 |  | 236,500,000
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due | 0.01 |  |  |  |  |  |  |  |
Cash payment for repurchase of common stock from employees in lieu of cash or withholding taxes due | $ 700,000 |  |  |  |  |  |  |  |

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