CAPITAL STOCK

6 Months Ended

Jun. 30, 2013

Equity [Abstract]

CAPITAL STOCK

CAPITAL STOCK

On October 27, 2006, a three-year $1 billion share repurchase program was approved by our Board of Directors. On December 16, 2008, the provisions of the share repurchase program were modified by our Board of Directors to replace the original three-year term with an indefinite term. We repurchased 1.4 and 1.1 shares of common stock for $39.6 and $24.6 during the three months ended June 30, 2013 and 2012, respectively, and 3.1 and 3.3 shares of common stock for $85.2 and $73.6 during the six months ended June 30, 2013 and 2012, respectively. To date, under the 2006 Share Repurchase Program, the Company has repurchased 15.3 shares for $629.3.

Separate from the 2006 Share Repurchase Program, the Company repurchased 0.1 shares and 0.1 shares for an aggregate price of $2.7 and $3.2, during the six months ended June 30, 2013 and 2012, respectively, in settlement of employee tax withholding obligations due upon the vesting of restricted stock or restricted stock units. Repurchases associated with employee tax withholding obligations were not significant during the three months ended June 30, 2013 and 2012.