Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues:
Product	$ 863.8	$ 804.7	$ 1,645.6	$ 1,576.6
Service	286.9	269.1	564.3	529.7
Total net revenues	1,150.7	1,073.8	2,209.9	2,106.3
Cost of revenues:
Product	321.3	292.6	599.5	573.2
Service	108.9	113.3	219.1	231.1
Total cost of revenues	430.2	405.9	818.6	804.3
Gross margin	720.5	667.9	1,391.3	1,302.0
Operating expenses:
Research and development	257.7	268.7	519.9	538.3
Sales and marketing	266.2	259.5	521.4	517.2
General and administrative	48.8	48.8	96.6	103.5
Amortization of purchased intangible assets	1.2	1.2	2.4	2.4
Restructuring charges	8.0	3.2	15.0	5.2
Acquisition and litigation charges	0.1	(0.2)	10.5	1.0
Total operating expenses	582.0	581.2	1,165.8	1,167.6
Operating income	138.5	86.7	225.5	134.4
Other (expense) income, net	(12.6)	2.8	(22.7)	(21.6)
Income before income taxes	125.9	89.5	202.8	112.8
Income tax provision	28.0	31.8	13.9	38.8
Net income	$ 97.9	$ 57.7	$ 188.9	$ 74.0
Net income per share:
Basic	$ 0.19	$ 0.11	$ 0.37	$ 0.14
Diluted	$ 0.19	$ 0.11	$ 0.37	$ 0.14
Shares used in computing net income per share:
Basic	503.0	527.8	503.8	528.0
Diluted	506.3	531.8	510.4	533.8