Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Total net revenues	$ 1,172.3	$ 1,086.3	$ 2,246.7	$ 2,084.3
Cost of revenues:
Total cost of revenues	490.4	466.7	949.2	885.4
Gross margin	681.9	619.6	1,297.5	1,198.9
Operating expenses:
Research and development	245.8	241.0	500.5	473.5
Sales and marketing	257.8	224.2	510.5	463.4
General and administrative	71.0	59.1	132.1	118.4
Restructuring charges	21.6	4.8	40.9	13.7
Total operating expenses	596.2	529.1	1,184.0	1,069.0
Operating income	85.7	90.5	113.5	129.9
Loss on extinguishment of debt	0.0	0.0	(60.6)	0.0
Other expense, net	(10.9)	(4.4)	(15.9)	(15.5)
Income before income taxes	74.8	86.1	37.0	114.4
Income tax provision	12.8	24.9	6.1	32.8
Net income	$ 62.0	$ 61.2	$ 30.9	$ 81.6
Net income per share:
Basic (in dollars per share)	$ 0.19	$ 0.18	$ 0.09	$ 0.25
Diluted, (in dollars per share)	$ 0.19	$ 0.18	$ 0.09	$ 0.24
Weighted-average shares used to compute net income per share:
Basic (in shares)	324.5	331.0	325.4	330.9
Diluted (in shares)	330.4	333.1	331.5	334.7
Product
Total net revenues	$ 759.2	$ 692.3	$ 1,431.6	$ 1,301.1
Cost of revenues:
Total cost of revenues	350.4	321.7	666.9	590.7
Service
Total net revenues	413.1	394.0	815.1	783.2
Cost of revenues:
Total cost of revenues	$ 140.0	$ 145.0	$ 282.3	$ 294.7