Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,501.7	$ 2,006.5
Short-term investments	887.3	1,026.1
Accounts receivable, net of allowances	648.3	852.0
Prepaid expenses and other current assets	253.4	299.9
Total current assets	4,290.7	4,184.5
Property and equipment, net	967.6	1,021.1
Long-term investments	259.0	988.4
Purchased intangible assets, net	115.0	128.1
Goodwill	3,094.3	3,096.2
Other long-term assets	373.7	415.5
Total assets	9,100.3	9,833.8
Current liabilities:
Accounts payable	184.7	217.6
Accrued compensation	177.2	186.0
Deferred revenue	814.1	1,030.3
Short-term debt	349.7	0.0
Other accrued liabilities	214.8	304.3
Total current liabilities	1,740.5	1,738.2
Long-term debt	1,788.6	2,136.3
Long-term deferred revenue	351.2	509.0
Long-term income taxes payable	436.7	650.6
Other long-term liabilities	132.4	118.8
Total liabilities	4,449.4	5,152.9
Commitments and contingencies (Note 13)
Stockholders' equity:
Convertible preferred stock, $0.00001 par value; 10.0 shares authorized; none issued and outstanding	0.0	0.0
Common stock, $0.00001 par value; 1,000.0 shares authorized; 345.1 shares and 365.5 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	0.0	0.0
Additional paid-in capital	7,698.4	8,042.1
Accumulated other comprehensive loss	(24.5)	(5.4)
Accumulated deficit	(3,023.0)	(3,355.8)
Total stockholders' equity	4,650.9	4,680.9
Total liabilities and stockholders' equity	$ 9,100.3	$ 9,833.8