Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Number of Shares Used In the Earnings Per Share Calculation

The number of shares used in earnings per share calculations is reconciled as follows:

	For the three months ended March 31
(in millions)	2019	2018
Weighted-average basic shares outstanding	140.1	144.4
Dilutive effect of stock options	0.4	0.4
Weighted-average diluted shares outstanding	140.5	144.8