Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Schedule of Net Income Per Share

Net income per share was calculated as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(in millions, except per share data)	2021		2020		2021		2020
Net income - basic and diluted	$	42.3	$	79.6	$	74.4	$	117.0
Weighted-average common shares outstanding:
Basic	94.6		93.0		94.4		92.8
Effect of dilutive securities:
Stock options	1.8		2.6		1.9		2.5
Restricted stock	0.2		0.5		0.4		0.5
2024 Notes	1.0		2.1		1.2		1.8
Diluted	97.7		98.2		98.0		97.6
Net income per share:
Basic	$	0.45	$	0.86	$	0.79	$	1.26
Diluted	$	0.43	$	0.81	$	0.76	$	1.20
Shares excluded from diluted per share amounts because their effect would have been anti-dilutive	4.7		2.2		3.7		1.4