CAPITAL STOCK

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

CAPITAL STOCK

CAPITAL STOCK

On October 27, 2006, a three-year $1 billion share repurchase program was approved by the Board of Directors (2006 Share Repurchase Program). On December 16, 2008, the provisions of the 2006 Share Repurchase Program were modified by the Board of Directors to replace the original three-year term with an indefinite term. We did not repurchase any shares of common stock under this program during the three months ended March 31, 2016. During the three months ended March 31, 2015 we repurchased 2.0 shares of common stock for $80.0. To date, under the 2006 Share Repurchase Program, the Company has repurchased 18.4 shares for $759.3.

Separate from the 2006 Share Repurchase Program, the Company repurchased 0.2 shares and 0.1 shares for an aggregate price of $6.9 and $3.6, during the three months endedMarch 31, 2016 and 2015, respectively, in settlement of employee tax withholding obligations due upon the vesting of RSUs and PSUs.