Earnings Per Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per Share

The denominator for basic and diluted earnings per share for the three and nine months ended September 30, 2013 and 2012 was as follows:

	Three Months Ended   September 30		Nine Months Ended   September 30
	2013	2012	2013	2012
Denominator for basic earnings per share – weighted average shares	297.4	318.9	300.0	327.2
Effect of dilutive securities – employee stock options, non-vested restricted stock awards and convertible debentures	7.1	3.0	4.5	3.5
Denominator for diluted earnings per share	304.5	321.9	304.5	330.7

During the three months ended September 30, 2013 and 2012, weighted average shares related to certain stock options of 0.1 and 14.8, respectively, were excluded from the denominator for diluted earnings per share because the stock options were anti-dilutive. During the nine months ended September 30, 2013 and 2012, weighted average shares related to certain stock options of 5.6 and 11.9, respectively, were excluded from the denominator for diluted earnings per share because the stock options were anti-dilutive.

During the nine months ended September 30, 2013, we issued approximately 2.4 restricted stock units under our stock incentive plans, 0.9 of which vesting is contingent upon us meeting specified annual operating gain targets for 2013. 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.