Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,810.8	$ 1,639.6
Short-term investments	398.2	332.2
Accounts receivable, net of allowances	507.6	598.9
Deferred tax assets, net	148.2	147.0
Prepaid expenses and other current assets	236.9	254.2
Total current assets	3,101.7	2,971.9
Property and equipment, net	912.2	904.3
Long-term investments	1,241.6	1,133.1
Restricted cash and investments	46.0	46.0
Purchased intangible assets, net	50.5	62.4
Goodwill	2,981.3	2,981.5
Other long-term assets	333.3	303.9
Total assets	8,666.6	8,403.1
Current liabilities:
Short-term debt	299.9	0
Accounts payable	223.6	234.6
Accrued compensation	169.9	225.0
Deferred revenue	855.5	780.8
Other accrued liabilities	221.5	287.3
Total current liabilities	1,770.4	1,527.7
Long-term debt	1,648.7	1,349.0
Long-term deferred revenue	319.2	294.9
Long-term income taxes payable	178.9	177.5
Other long-term liabilities	132.3	134.9
Total liabilities	4,049.5	3,484.0
Commitments and contingencies (Note 15)
Stockholders' equity:
Convertible preferred stock, $0.00001 par value; 10.0 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value; 1,000.0 shares authorized; 403.8 shares and 416.2 shares issued and outstanding as of March 31, 2015 and December 31, 2014, respectively	0	0
Additional paid-in capital	8,584.7	8,794.0
Accumulated other comprehensive loss	(29.2)	(13.8)
Accumulated deficit	(3,938.4)	(3,861.1)
Total stockholders' equity	4,617.1	4,919.1
Total liabilities and stockholders' equity	$ 8,666.6	$ 8,403.1