CAPITAL STOCK

9 Months Ended

Sep. 30, 2017

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 (Share Repurchase Program). On December 16, 2008, the provisions of the Share Repurchase Program were modified by the Board of Directors to replace the original three-year term with an indefinite term. During the nine months endedSeptember 30, 2017 and 2016, we repurchased and retired 0.8 and 1.9 shares of common stock for $30.0 and $66.6, respectively, under this program. To date, the Company has repurchased 21.2 shares for $859.4 under the Share Repurchase Program.

Separate from the Share Repurchase Program, the Company repurchased 0.1 shares and 0.2 shares for an aggregate price of $2.9 and $7.8, during the nine months endedSeptember 30, 2017 and 2016, respectively, in settlement of employee tax withholding obligations due upon the vesting of RSUs and PSUs.