Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 741.5	$ 628.8
Cost of sales	278.9	230.7
Gross profit	462.6	398.1
Operating expenses:
Research and development	119.0	135.9
Amortization of intangible assets	1.8	2.0
Selling, general and administrative	294.6	218.9
Total operating expenses	415.4	356.8
Operating income	47.2	41.3
Interest expense	(4.6)	(4.6)
Income from equity investments	0.0	0.2
Interest and other income (expense), net	21.9	(0.8)
Income before income taxes	64.5	36.1
Income tax expense (benefit)	15.9	(61.2)
Net income	$ 48.6	$ 97.3
Basic net income per share (USD per share)	$ 0.13	$ 0.25
Shares used to compute basic net income per share (shares)	386.7	388.9
Diluted net income per share (USD per share)	$ 0.12	$ 0.23
Shares used to compute diluted net income per share (shares)	418.5	428.7

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274