Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Summary of Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted (Loss) Income Per Share of Common Stock

The following table reconciles the numerator and denominator used to calculate basic and diluted EPS:

	Year Ended December 31,
	2020		2019		2018
	(In millions, except per share amounts)
Numerator:
Net income	$	137.7	$	141.0	$	137.3
Income allocated to participating securities	(1.7)		(2.6)		(2.9)
Net income for basic and diluted EPS	$	136.0	$	138.4	$	134.4
Denominator:
Basic weighted average shares	77.4		77.2		74.8
Effect of:
21/4% Notes	4.5		4.4		1.9
Awards issued under equity plans	—		0.1		0.1
Diluted weighted average shares	81.9		81.7		76.8
Basic EPS	$	1.76	$	1.79	$	1.80
Diluted EPS	$	1.66	$	1.69	$	1.75