Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Summary of Earnings Per Share Basic and Diluted

	Quarter Ended September 30,				Nine Months Ended September 30,
(In millions, except per share data)	2020		2019		2020		2019
Basic net income per common share:
Net income	$	9.7	$	80.3	$	51.1	$	233.4
Weighted average common shares outstanding		83.8		85.1		83.7		85.1
Basic net income per common share	$	0.12	$	0.94	$	0.61	$	2.74
Diluted net income per common share:
Net income		9.7		80.3		51.1		233.4
Weighted average common shares outstanding — Basic		83.8		85.1		83.7		85.1
Plus incremental shares from assumed conversions:
Restricted stock units		0.1		0.4		0.2		0.4
Stock options		0.1		0.6		0.1		0.6
Weighted average common shares outstanding — Dilutive		84.0		86.1		84.0		86.1
Diluted net income per common share	$	0.12	$	0.93	$	0.61	$	2.71