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Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of net income (loss) per share

Net income per share was calculated as follows:

			Year Ended December 31,
(in millions, except per share data)			2020						2019						2018
Net income - basic and diluted			$	407.3					$	37.0					$	21.1
Weighted-average common shares outstanding:
Basic			93.1						91.6						90.2
Effect of dilutive securities:
Stock options			2.4						2.6						3.2
Restricted stock units			0.5						0.4						0.6
2024 Notes			1.8						1.1						1.3
Diluted			97.8						95.7						95.4
Net income per share:
Basic			$	4.38					$	0.40					$	0.23
Diluted			$	4.16					$	0.39					$	0.22

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- References

No definition available.

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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