Earnings (loss) per share

Basic earnings (loss) per share ("EPS") amounts are calculated by dividing net income (loss) allocated to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS amounts assume the issuance of common stock for all dilutive securities.

The following table shows the basic and diluted earnings (loss) per share:



	For the three months ended June 30,
	2018						2017
	Income			Shares (in millions)	Per Share		Income			Shares (in millions)	Per Share
Net income	$	19.4					$	7.1
Amount allocated to common stockholders	92.2		%				92.0		%
Basic EPS:
Net income allocated to common stockholders	$	17.9		87.6	$	0.20	$	6.6		87.3	$	0.08
Effect of Dilutive Securities:
Share-based compensation	—			0.8			—			0.8
Diluted EPS:
Net income allocated to common stockholders with assumed conversion	$	17.9		88.4	$	0.20	$	6.6		88.1	$	0.07

	For the six months ended June 30,
	2018						2017
	Income			Shares (in millions)	Per Share		Loss			Shares (in millions)	Per Share
Net income (loss)	$	19.1					$	(8.0	)
Amount allocated to common stockholders	92.2		%				100.0		%
Basic EPS:
Net income (loss) allocated to common stockholders	$	17.6		87.6	$	0.20	$	(8.0	)	87.3	$	(0.09	)
Effect of Dilutive Securities:
Share-based compensation	—			0.8			—			—
Diluted EPS:
Net income (loss) allocated to common stockholders	$	17.6		88.4	$	0.20	$	(8.0	)	87.3	$	(0.09	)



	Three months ended June 30,		Six months ended June 30,
Securities excluded from the calculation of diluted EPS (in millions):	2018	2017	2018	2017⁽¹⁾
Share-based compensation	0.6	0.4	0.6	0.5

⁽¹⁾ In periods when we report a net loss, all share-based compensation awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on the loss per share calculation.