Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Net Income Per Share

Net income per share was calculated as follows:

	Three Months Ended March 31,
(in millions, except per share data)	2020		2019
Net income (loss) - basic and diluted	$	37.4	$	(102.1	)
Weighted-average common shares outstanding:
Basic		92.6		91.1
Effect of dilutive securities:
Stock options		2.4		—
Restricted stock		0.5		—
2024 Notes		1.5		—
Diluted		97.0		91.1
Net income per share:
Basic	$	0.40	$	(1.12	)
Diluted	$	0.39	$	(1.12	)

Schedule of Anti-Dilutive Shares Excluded from Diluted Per Share Amounts

Shares which have been excluded from diluted per share amounts because their effect would have been anti-dilutive include the following:

	Three Months Ended March 31,
(in millions)	2020		2019
Stock options, restricted stock units and convertible senior notes		3.3		8.2