Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Reconciliation of information used in computing basic and diluted earnings per share

Basic and diluted earnings per share were computed as follows:

	Years Ended December 31,
(in millions, except per share amounts)	2022		2021		2020
(Loss) earnings from continuing operations	$	(430.1)	$	150.2	$	2.9
Earnings from discontinued operations, net	—		0.2		3.7
Net (loss) earnings	$	(430.1)	$	150.4	$	6.6
Basic (loss) earnings per common share:
(Loss) earnings from continuing operations	$	(4.69)	$	1.63	$	0.03
Earnings from discontinued operations, net	—		—		0.04
Net (loss) earnings	$	(4.69)	$	1.63	$	0.07
Weighted-average shares outstanding	91.7		92.3		91.7
Diluted (loss) earnings per common share:
(Loss) earnings from continuing operations	$	(4.69)	$	1.59	$	0.03
Earnings from discontinued operations, net	—		—		0.04
Net (loss) earnings	$	(4.69)	$	1.59	$	0.07
Diluted weighted-average shares outstanding	91.7		94.7		92.9