Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenues	$ 505.0	$ 405.1
Cost of sales	161.1	148.6
Gross profit	343.9	256.5
Operating expenses:
Research and development	109.4	73.1
Selling, general and administrative	188.6	149.8
Total operating expenses	298.0	222.9
Operating income	45.9	33.6
Interest expense	(24.8)	(15.4)
Interest and other income, net	0.1	4.2
Income before income taxes	21.2	22.4
Income tax expense (benefit)	(19.1)	2.5
Net income	$ 40.3	$ 19.9
Basic net income per share (USD per share)	$ 0.42	$ 0.22
Shares used to compute basic net income per share (shares)	96.3	91.8
Diluted net income per share (USD per share)	$ 0.41	$ 0.21
Shares used to compute diluted net income per share (shares)	99.4	94.1

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227