Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net revenues:
Product	$ 869.7	$ 928.2	$ 2,615.8	$ 2,543.3
Service	388.1	357.1	1,171.9	1,061.2
Total net revenues	1,257.8	1,285.3	3,787.7	3,604.5
Cost of revenues:
Product	336.0	349.6	1,026.4	955.8
Service	149.4	136.2	440.4	401.9
Total cost of revenues	485.4	485.8	1,466.8	1,357.7
Gross margin	772.4	799.5	2,320.9	2,246.8
Operating expenses:
Research and development	236.4	251.8	752.8	750.7
Sales and marketing	232.5	242.9	716.6	718.4
General and administrative	70.6	54.0	176.7	172.0
Restructuring charges	2.0	0.8	29.4	3.2
Total operating expenses	541.5	549.5	1,675.5	1,644.3
Operating income	230.9	250.0	645.4	602.5
Other expense, net	(5.1)	(13.4)	(33.8)	(47.2)
Income before income taxes	225.8	236.6	611.6	555.3
Income tax provision	60.1	64.2	157.3	151.5
Net income	$ 165.7	$ 172.4	$ 454.3	$ 403.8
Net income per share:
Basic (in dollars per share)	$ 0.44	$ 0.45	$ 1.20	$ 1.06
Diluted, (in dollars per share)	$ 0.43	$ 0.45	$ 1.18	$ 1.04
Shares used in computing net income per share:
Basic (in shares)	378.3	381.0	380.0	382.3
Diluted (in shares)	382.7	384.5	386.5	387.9
Cash dividends declared per common stock (in dollars per share)	$ 0.10	$ 0.10	$ 0.30	$ 0.30