Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenues:
Product	$ 928.2	$ 925.4	$ 2,543.3	$ 2,589.2
Service	357.1	323.2	1,061.2	949.0
Total net revenues	1,285.3	1,248.6	3,604.5	3,538.2
Cost of revenues:
Product	349.6	322.6	955.8	923.1
Service	136.2	128.6	401.9	378.9
Total cost of revenues	485.8	451.2	1,357.7	1,302.0
Gross margin	799.5	797.4	2,246.8	2,236.2
Operating expenses:
Research and development	251.8	247.0	750.7	747.3
Sales and marketing	242.9	235.3	718.4	687.9
General and administrative	54.0	57.1	172.0	168.6
Restructuring charges (benefits)	0.8	0.0	3.2	(0.5)
Total operating expenses	549.5	539.4	1,644.3	1,603.3
Operating income	250.0	258.0	602.5	632.9
Other expense, net	(13.4)	(8.4)	(47.2)	(41.3)
Income before income taxes	236.6	249.6	555.3	591.6
Income tax provision	64.2	51.9	151.5	155.7
Net income	$ 172.4	$ 197.7	$ 403.8	$ 435.9
Net income per share:
Basic, in dollars per share	$ 0.45	$ 0.52	$ 1.06	$ 1.11
Diluted, in dollars per share	$ 0.45	$ 0.51	$ 1.04	$ 1.09
Shares used in computing net income per share:
Basic (in shares)	381.0	382.8	382.3	393.2
Diluted (in shares)	384.5	389.2	387.9	401.2
Cash dividends declared per common stock (in dollars per share)	$ 0.1	$ 0.10	$ 0.3	$ 0.3