Net (Loss) Income per Common Share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Summary of Earnings Per Share Basic and Diluted

	Quarter Ended March 31,
(In millions, except per share data)	2021			2020
Basic net (loss) income per common share:
Net (loss) income	$	(14.0	)	$	42.4
Weighted average common shares outstanding		84.0			83.7
Basic net (loss) income per common share	$	(0.17	)	$	0.51
Diluted net (loss) income per common share:
Net (loss) income		(14.0	)		42.4
Weighted average common shares outstanding — Basic		84.0			83.7
Plus incremental shares from assumed conversions:
Restricted stock units		-			0.3
Stock options		-			0.3
Weighted average common shares outstanding — Dilutive		84.0			84.3
Diluted net (loss) income per common share	$	(0.17	)	$	0.50