Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended March 31
	2019		2018
Numerator:
Net income	$	41.5	$	76.3
Denominator:
Weighted-average shares outstanding - basic	36.5		37.9
Effect of dilutive securities:
Equity compensation plans	0.6		0.6
Weighted-average shares outstanding - diluted	37.1		38.5
Basic earnings per share	$	1.14	$	2.02
Diluted earnings per share	$	1.12	$	1.98