Earnings (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Summary of Number of Participating Securities

The following table presents the number of participating securities (in millions):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Earnings allocated to participating shareholders	$	0.5	$	—	$	0.8	$	—
Number of participating securities		1.0		0.9		1.0		0.9

Summary of Diluted Earning Per Share

The following table presents the number of common shares used in the calculation of net income (loss) per share from continuing operations (in millions):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Weighted-average number of common shares-basic		27.4		26.0		27.3		26.0
Dilutive potential common shares		0.1		0.2		0.2		—
Weighted-average number of common shares-diluted		27.5		26.2		27.5		26.0