Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions, except per share data)	2021		2020		2021		2020
Net income from continuing operations attributable to common shareholders	$	111.4	$	49.4	$	325.5	$	120.3
Income from discontinued operations, net of tax (Note 3)	5.2		7.2		37.8		13.9
Net income attributable to common shareholders	$	116.6	$	56.6	$	363.3	$	134.2
Average basic shares outstanding	58.7		58.1		58.5		58.4
Effect of dilutive share-based awards	0.8		0.4		0.7		0.5
Average diluted shares outstanding	59.5		58.5		59.2		58.9
Earnings per basic share:
Earnings per basic share from continuing operations	$	1.90	$	0.85	$	5.56	$	2.06
Earnings per basic share from discontinued operations	0.09		0.12		0.65		0.24
Earnings per basic share	$	1.99	$	0.97	$	6.21	$	2.30
Earnings per diluted share:
Earnings per diluted share from continuing operations	$	1.87	$	0.84	$	5.50	$	2.04
Earnings per diluted share from discontinued operations	0.09		0.13		0.64		0.24
Earnings per diluted share	$	1.96	$	0.97	$	6.14	$	2.28