Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,614.2	$ 2,006.5
Short-term investments	317.7	1,026.1
Accounts receivable, net of allowances	679.9	852.0
Prepaid expenses and other current assets	308.9	299.9
Total current assets	3,920.7	4,184.5
Property and equipment, net	1,013.8	1,021.1
Long-term investments	516.5	988.4
Purchased intangible assets, net	123.8	128.1
Goodwill	3,096.2	3,096.2
Other long-term assets	407.5	415.5
Total assets	9,078.5	9,833.8
Current liabilities:
Accounts payable	189.2	217.6
Accrued compensation	172.8	186.0
Deferred revenue	888.2	1,030.3
Short-term debt	349.3	0.0
Other accrued liabilities	230.5	304.3
Total current liabilities	1,830.0	1,738.2
Long-term debt	1,787.7	2,136.3
Long-term deferred revenue	368.7	509.0
Long-term income taxes payable	649.5	650.6
Other long-term liabilities	117.9	118.8
Total liabilities	4,753.8	5,152.9
Commitments and contingencies (Note 14)
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; 349.0 shares and 365.5 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	0.0	0.0
Additional paid-in capital	7,615.5	8,042.1
Accumulated other comprehensive income (loss)	12.5	(5.4)
Accumulated deficit	(3,303.3)	(3,355.8)
Total stockholders' equity	4,324.7	4,680.9
Total liabilities and stockholders' equity	$ 9,078.5	$ 9,833.8