EARNINGS PER-SHARE

3 Months Ended

Mar. 31, 2019

10. EARNINGS PER SHARE

Basic earnings per share is determined by dividing net income by the weighted-average common shares outstanding during the period. The calculation of diluted earnings per share includes the dilutive effect of unexercised non-qualified stock options and non-vested restricted stock units. The denominator used to compute basic and diluted earnings per share for the three months ended March 31, 2019 and 2018, are as follows:


	Three Months Ended March 31, 2019					Three Months Ended March 31, 2018
			Weighted	Per				Weighted	Per
			Average	Common				Average	Common
	Net		Common	Share		Net		Common	Share
(In millions, except per share amounts)	Income		Shares	Amount		Income		Shares	Amount
Basic:	$	12.5	42.8	$	0.29	$	14.2	42.6	$	0.33
Effect of Dilutive Securities:			0.3		—			0.3		—
Diluted:	$	12.5	43.1	$	0.29	$	14.2	42.9	$	0.33

The computation of weighted-average common shares outstanding excludes a nominal amount of anti-dilutive non-qualified stock options for each period ended March 31, 2019 and 2018.