Earnings Per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

4. Earnings Per Share

The following table sets forth the computation of basic and diluted income per common share for the periods presented (dollars and shares in millions, except per share data):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
Numerator:	2020			2019			2020			2019
Net income	$	56.7		$	193.6		$	198.3		$	380.4
Less: Distributed and undistributed earnings allocated to participating    securities		(0.5	)		(1.5	)		(1.8	)		(2.9	)
Net income attributable to common shareholders	$	56.2		$	192.1		$	196.5		$	377.5
Denominator:
Weighted average basic common shares outstanding		94.0			93.8			94.0			93.8
Effect of dilutive securities		0.4			0.2			0.4			0.2
Weighted average diluted common shares outstanding		94.4			94.0			94.4			94.0
Basic income per common share	$	0.60		$	2.05		$	2.09		$	4.03
Diluted income per common share	$	0.59		$	2.04		$	2.08		$	4.02