Earnings Per Share

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE DATA

The following table provides a reconciliation of the data used in the calculation of basic and diluted common shares outstanding for the three years ended December 31, 2018, 2017 and 2016.

	2018	2017	2016
Basic weighted average common shares outstanding	87.7	88.3	89.2
Add: Dilutive impact of outstanding equity awards	1.0	0.7	0.7
Diluted weighted average common shares outstanding	88.7	89.0	89.9

The following table provides the number of shares underlying stock options excluded from the computation of diluted earnings per share for the years ended December 31, 2017 and 2016 because they were anti-dilutive. There were no anti-dilutive shares underlying stock options excluded from the computation of diluted earnings per share for the year ended December 31, 2018.

	2017		2016
Anti-dilutive stock options	0.3		0.7
Average exercise price	$	42.43	$	38.34
Year(s) of expiration	2024 - 2025		2024 - 2026

In addition, 0.1 of outstanding employee PSU awards (see Note 17, Long-Term Incentive Employee Compensation, for additional information on PSU awards) were excluded from the computation of diluted earnings per share for the years ended December 31, 2017 and 2016, respectively, as the necessary performance conditions had not yet been satisfied.