Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Calculation of pro forma basic and diluted earnings per share

The calculation of basic and diluted earnings per share of common stock is as follows (dollars in millions, except per share data):

	Three Months Ended March 31,
	2022		2021
Numerator:
Income from continuing operations attributable to controlling interests	$	23.8	$	18.5
Income from discontinued operations attributable to controlling interests (Note 3)	—		8.5
Net income attributable to common stock	$	23.8	$	27.0
Denominator:
Weighted-average shares of common stock outstanding—basic	43,969,713		79,319,556
Potential shares of common stock:
Restricted stock units	10,112		35,621
Employee stock options	1,347,565		2,965,491
Weighted-average shares of common stock outstanding—diluted	45,327,390		82,320,668
Earnings per share of common stock attributable to controlling interests:
Basic
Continuing operations	$	0.54	$	0.23
Discontinued operations	—		0.11
Basic earnings per share of common stock attributable to controlling interests	$	0.54	$	0.34
Diluted
Continuing operations	$	0.53	$	0.22
Discontinued operations	—		0.11
Diluted earnings per share of common stock attributable to controlling interests	$	0.53	$	0.33