Shareholders' Equity

6 Months Ended

Jun. 30, 2015

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ equity

During the six months endedJune 30, 2015, we declared two cash dividends of $0.08 per common share each for a total of $58.2 million and repurchased 15.3 million shares under our repurchase authorization for a total of $313.0 million. At June 30, 2015, we had remaining authorization to repurchase $425.4 million of common shares. During the six months ended June 30, 2014, we declared two cash dividends of $0.05 per common share each for a total of $38.0 million and repurchased 5.0 million shares under our repurchase authorization for a total of $97.6 million.

Under our share-based compensation plans, we accept shares as payment under certain conditions related to stock option exercises and vesting of shares, generally related to the payment of minimum tax obligations. During the six months endedJune 30, 2015 and 2014, employees surrendered shares valued at $9.0 million and $6.1 million, respectively, under these plans. Such share transactions are excluded from the above noted share repurchase authorization.