Amount of damages awarded to the plaintiff in the legal matter.

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Number of another entity's patents that the entity has allegedly infringed.

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Number of another entity's patents that the entity was found to have infringed.

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Number of another entity's patents that the entity was found not to have infringed.

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Amount of stock repurchase plan authorized.

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Subsequent Event (Details) (USD $)	0 Months Ended		1 Months Ended	0 Months Ended
Subsequent Event (Details) (USD $)	Dec. 08, 2010 patent	Jan. 26, 2015 patent	Jan. 31, 2014 patent	Feb. 06, 2015 patent	Jan. 02, 2015	Mar. 29, 2013	Feb. 03, 2015
Subsequent Event [Line Items]
Stock repurchase program, authorized amount						$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount					283,000,000
Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, authorized amount							1,000,000,000
Pending Litigation \| Intellectual Ventures (IV) vs. Symantec
Subsequent Event [Line Items]
Number of patents allegedly infringed	4
Pending Litigation \| Intellectual Ventures (IV) vs. Symantec \| Subsequent Event
Subsequent Event [Line Items]
Number of patents allegedly infringed		3
Damages sought		299,000,000
Judicial Ruling \| Intellectual Ventures (IV) vs. Symantec
Subsequent Event [Line Items]
Number of patents dismissed from case			1
Judicial Ruling \| Intellectual Ventures (IV) vs. Symantec \| Subsequent Event
Subsequent Event [Line Items]
Number of patents found infringed				2
Damages awarded				$ 17,000,000