Earnings Per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per Share

The denominator for basic and diluted earnings per share for the three and six months ended June 30, 2014 and 2013 is as follows:

	Three Months Ended   June 30		Six Months Ended   June 30
	2014	2013	2014	2013
Denominator for basic earnings per share – weighted-average shares	276.8	299.5	280.8	301.3
Effect of dilutive securities – employee stock options, non-vested restricted stock awards and convertible debentures	9.2	3.7	8.5	3.2
Denominator for diluted earnings per share	286.0	303.2	289.3	304.5

During the three months ended June 30, 2014 and 2013, weighted-average shares related to certain stock options of 1.4 and 5.3, respectively, were excluded from the denominator for diluted earnings per share because the stock options were anti-dilutive. During the six months ended June 30, 2014 and 2013, weighted-average shares related to certain stock options of 1.0 and 8.4, respectively, were excluded from the denominator for diluted earnings per share because the stock options were anti-dilutive.

During the three and six months ended June 30, 2013, shares related to the conversion feature of our Debentures were excluded from the denominator for diluted earnings per share because they were anti-dilutive.

During the six months ended June 30, 2014, we issued approximately 1.4 restricted stock units under our stock incentive plans, 0.7 of which vesting is contingent upon us meeting specified annual operating gain targets for 2014. The contingent restricted stock units have been excluded from the denominator for diluted earnings per share and will be included only if and when the contingency is met.