Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net revenues:
Product	$ 710.8	$ 828.9
Service	371.8	392.1
Total net revenues	1,082.6	1,221.0
Revenue	1,082.6	1,221.0
Cost of revenues:
Product	306.4	330.2
Service	157.8	144.2
Total cost of revenues	464.2	474.4
Gross margin	618.4	746.6
Operating expenses:
Research and development	269.4	276.2
Sales and marketing	239.4	244.2
General and administrative	56.0	50.5
Restructuring (benefits) charges	(1.9)	19.4
Total operating expenses	562.9	590.3
Operating income	55.5	156.3
Other expense, net	(14.1)	(15.7)
Income before income taxes	41.4	140.6
Income tax provision	7.0	31.8
Net income	$ 34.4	$ 108.8
Net income per share:
Basic (in dollars per share)	$ 0.10	$ 0.29
Diluted, (in dollars per share)	$ 0.10	$ 0.28
Shares used in computing net income per share:
Basic (in shares)	355.3	380.9
Diluted (in shares)	360.6	388.0
Cash dividends declared per common stock (in dollars per share)	$ 0.18	$ 0.10