CAPITAL STOCK

6 Months Ended

Jun. 30, 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. During the six months ended June 30, 2016 and 2015, we repurchased 0.6 and 2.0 shares of common stock for $20.0 and $80.0, respectively, under this program. To date, under the 2006 Share Repurchase Program, the Company has repurchased 19.0 shares for $779.3. On May 16, 2016, we canceled all 15.0 shares in our treasury account. Shares repurchased after May 16, 2016 were canceled following the repurchase.

Separate from the 2006 Share Repurchase Program, the Company repurchased 0.2 shares and 0.1 shares for an aggregate price of $7.5 and $3.7, during the six months endedJune 30, 2016 and 2015, respectively, in settlement of employee tax withholding obligations due upon the vesting of RSUs and PSUs.