Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 507.6	$ 782.1
Short-term investments	471.0	621.4
Accounts receivable, net	271.1	301.4
Inventories	202.4	179.6
Prepaids and other current assets	42.4	38.3
Deferred tax assets	38.9	9.6
Total current assets	1,533.4	1,932.4
Property, plant and equipment, net	326.7	309.9
Long-term investments	1,064.8	1,350.4
Long-term deferred tax assets	143.7	126.1
Intangible and other assets, net	138.0	94.1
Goodwill	198.0	137.4
Total assets	3,404.6	3,950.3
Current liabilities:
Accounts payable	58.9	46.2
Accrued compensation and employee benefits	74.5	70.7
Deferred revenue	225.1	200.1
Other accrued liabilities	137.4	63.9
Total current liabilities	495.9	380.9
Other long-term liabilities	86.3	68.0
Total liabilities	582.2	448.9
Contingencies (Note 6)
Stockholders’ equity:
Preferred stock, 2.5 shares authorized, $0.001 par value, issuable in series; no shares issued and outstanding as of June 30, 2014, and December 31, 2013, respectively	0	0
Common stock, 100.0 shares authorized, $0.001 par value, 36.0 shares and 38.2 shares outstanding as of June 30, 2014, and December 31, 2013, respectively	0	0
Additional paid-in capital	2,509.6	2,519.9
Retained earnings	312.2	979.4
Accumulated other comprehensive income	0.6	2.1
Total stockholders’ equity	2,822.4	3,501.4
Total liabilities and stockholders’ equity	$ 3,404.6	$ 3,950.3