Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total net revenues	$ 1,001.7	$ 1,082.6
Cost of revenues:
Total cost of revenues	419.4	464.2
Gross margin	582.3	618.4
Operating expenses:
Research and development	227.6	269.4
Sales and marketing	228.5	239.4
General and administrative	68.2	56.0
Restructuring charges (benefits)	15.3	(1.9)
Total operating expenses	539.6	562.9
Operating income	42.7	55.5
Other income (expense), net	1.8	(14.1)
Income before income taxes	44.5	41.4
Income tax provision	13.4	7.0
Net income	$ 31.1	$ 34.4
Net income per share:
Basic (in dollars per share)	$ 0.09	$ 0.10
Diluted, (in dollars per share)	$ 0.09	$ 0.10
Shares used in computing net income per share:
Basic (in shares)	348.1	355.3
Diluted (in shares)	352.7	360.6
Product
Total net revenues	$ 618.7	$ 710.8
Cost of revenues:
Total cost of revenues	270.0	306.4
Service
Total net revenues	383.0	371.8
Cost of revenues:
Total cost of revenues	$ 149.4	$ 157.8