Weighted Average Shares Outstanding (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Weighted Average Shares Outstanding

The effects of potential common stock were determined using the treasury stock method. Weighted average shares outstanding are shown below:

	Three months ended March 31,
	2019	2018
Basic shares outstanding	103.6	102.9
Effect of potential common stock:
Common stock awards	1.1	1.3
Diluted shares outstanding	104.7	104.2