Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,690.4	$ 2,006.5
Short-term investments	432.3	1,026.1
Accounts receivable, net of allowances	702.2	852.0
Prepaid expenses and other current assets	279.7	299.9
Total current assets	4,104.6	4,184.5
Property and equipment, net	987.1	1,021.1
Long-term investments	407.8	988.4
Purchased intangible assets, net	119.4	128.1
Goodwill	3,096.1	3,096.2
Other long-term assets	406.0	415.5
Total assets	9,121.0	9,833.8
Current liabilities:
Accounts payable	183.2	217.6
Accrued compensation	199.6	186.0
Deferred revenue	872.1	1,030.3
Short-term debt	349.5	0.0
Other accrued liabilities	204.1	304.3
Total current liabilities	1,808.5	1,738.2
Long-term debt	1,788.2	2,136.3
Long-term deferred revenue	365.1	509.0
Long-term income taxes payable	615.6	650.6
Other long-term liabilities	125.9	118.8
Total liabilities	4,703.3	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; 349.4 shares and 365.5 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	0.0	0.0
Additional paid-in capital	7,609.8	8,042.1
Accumulated other comprehensive loss	(16.4)	(5.4)
Accumulated deficit	(3,175.7)	(3,355.8)
Total stockholders' equity	4,417.7	4,680.9
Total liabilities and stockholders' equity	$ 9,121.0	$ 9,833.8