Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Numerator:
Income from continuing operations attributable to controlling interests	$	28.6	$	24.7	$	52.4	$	43.2
Income from discontinued operations attributable to controlling interests (Note 3)	—		508.0		—		516.5
Net income attributable to common stock	$	28.6	$	532.7	$	52.4	$	559.7
Denominator:
Weighted-average shares of common stock outstanding—basic	41,425,555		79,351,567		42,690,683		79,335,650
Potential shares of common stock:
Restricted stock units	6,935		23,323		8,523		29,472
Employee stock options	1,085,635		3,551,234		1,216,600		3,258,363
Weighted-average shares of common stock outstanding—diluted	42,518,125		82,926,124		43,915,806		82,623,485
Earnings per share of common stock attributable to controlling interests:
Basic
Continuing operations	$	0.69	$	0.31	$	1.23	$	0.54
Discontinued operations	—		6.40		—		6.51
Basic earnings per share of common stock attributable to controlling interests	$	0.69	$	6.71	$	1.23	$	7.05
Diluted
Continuing operations	$	0.67	$	0.29	$	1.19	$	0.52
Discontinued operations	—		6.13		—		6.25
Diluted earnings per share of common stock attributable to controlling interests	$	0.67	$	6.42	$	1.19	$	6.77